[Android] Fix ScrollTo regression when IsGrouped true on CollectionView#35356
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🚀 Dogfood this PR with:
curl -fsSL https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.sh | bash -s -- 35356Or
iex "& { $(irm https://raw.githubusercontent.com/dotnet/maui/main/eng/scripts/get-maui-pr.ps1) } 35356" |
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Hey there @@SubhikshaSf4851! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed. |
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Pull request overview
Fixes an Android regression in CollectionView.ScrollTo(index) when IsGrouped=true and the caller does not provide a groupIndex (defaults to -1), restoring the ability to scroll to the expected position (e.g., ScrollTo(0)).
Changes:
- Android handler: restore
GroupIndex < 0behavior inMauiRecyclerView.DetermineTargetPositionby falling back to flat index lookup. - HostApp: add
Issue35313sample page to manually reproduce/verify groupedScrollTobehavior. - UI tests: add an Android-only Appium test validating
ScrollTo(0)on a groupedCollectionView.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| src/Controls/src/Core/Handlers/Items/Android/MauiRecyclerView.cs | Restores grouped ScrollTo(index) behavior when no group index is specified. |
| src/Controls/tests/TestCases.HostApp/Issues/Issue35313.cs | Adds a repro page for grouped CollectionView.ScrollTo regression. |
| src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35313.cs | Adds an Android UI test that verifies the regression and the fix. |
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Expert Review — 4 findings
See inline comments for details.
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/azp run maui-pr-uitests |
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Could you please verify the failing test and review ai's suggestions?
🤖 AI Summary
📊 Review Session —
|
| Test | Without Fix (expect FAIL) | With Fix (expect PASS) |
|---|---|---|
🖥️ Issue35313 Issue35313 |
✅ PASS — 593s |
🔴 Without fix — 🖥️ Issue35313: ⚠️ ENV ERROR · 1734s
(truncated to last 15,000 chars)
s/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.RunInstall() [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
Build FAILED.
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: Mono.AndroidTools.InstallFailedException: Unexpected install output: cmd: Failure calling service package: Broken pipe (32) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass105_0.<InstallPackage>b__0(Task`1 t) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: --- End of stack trace from previous location --- [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: --- End of stack trace from previous location --- [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at AndroidDeviceExtensions.PushAndInstallPackageAsync(AndroidDevice device, PushAndInstallCommand command, CancellationToken token) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.InstallPackage(Boolean installed) [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
/home/vsts/work/1/s/.dotnet/packs/Microsoft.Android.Sdk.Linux/36.1.2/tools/Xamarin.Android.Common.Debugging.targets(333,5): error ADB0010: at Xamarin.Android.Tasks.FastDeploy.RunInstall() [/home/vsts/work/1/s/src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj::TargetFramework=net10.0-android]
0 Warning(s)
1 Error(s)
Time Elapsed 00:15:41.57
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Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:08:55.49
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
Broadcast completed: result=0
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
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Test run for /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)
Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
/home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.15] Discovering: Controls.TestCases.Android.Tests
[xUnit.net 00:00:00.49] Discovered: Controls.TestCases.Android.Tests
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 05/12/2026 21:17:33 FixtureSetup for Issue35313(Android)
>>>>> 05/12/2026 21:17:37 GroupedCollectionViewScrollToIndexZeroShouldScrollToStart Start
>>>>> 05/12/2026 21:17:56 GroupedCollectionViewScrollToIndexZeroShouldScrollToStart Stop
>>>>> 05/12/2026 21:17:56 Log types: logcat, bugreport, server
Failed GroupedCollectionViewScrollToIndexZeroShouldScrollToStart [20 s]
Error Message:
System.TimeoutException : Timed out waiting for element...
Stack Trace:
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.Issues.Issue35313.GroupedCollectionViewScrollToIndexZeroShouldScrollToStart() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35313.cs:line 22
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
NUnit Adapter 4.5.0.0: Test execution complete
Total tests: 1
Test Run Failed.
Failed: 1
Total time: 51.6247 Seconds
🟢 With fix — 🖥️ Issue35313: PASS ✅ · 593s
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Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:07:41.87
Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
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Broadcasting: Intent { act=android.intent.action.CLOSE_SYSTEM_DIALOGS flg=0x400000 }
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All projects are up-to-date for restore.
##vso[build.updatebuildnumber]10.0.70-ci+azdo.14079065
Graphics -> /home/vsts/work/1/s/artifacts/bin/Graphics/Debug/net10.0/Microsoft.Maui.Graphics.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.14079065
Essentials -> /home/vsts/work/1/s/artifacts/bin/Essentials/Debug/net10.0/Microsoft.Maui.Essentials.dll
Controls.CustomAttributes -> /home/vsts/work/1/s/artifacts/bin/Controls.CustomAttributes/Debug/net10.0/Controls.CustomAttributes.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.14079065
Core -> /home/vsts/work/1/s/artifacts/bin/Core/Debug/net10.0/Microsoft.Maui.dll
Controls.BindingSourceGen -> /home/vsts/work/1/s/artifacts/bin/Controls.BindingSourceGen/Debug/netstandard2.0/Microsoft.Maui.Controls.BindingSourceGen.dll
##vso[build.updatebuildnumber]10.0.70-ci+azdo.14079065
Controls.Core -> /home/vsts/work/1/s/artifacts/bin/Controls.Core/Debug/net10.0/Microsoft.Maui.Controls.dll
UITest.Core -> /home/vsts/work/1/s/artifacts/bin/UITest.Core/Debug/net10.0/UITest.Core.dll
VisualTestUtils -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils/Debug/netstandard2.0/VisualTestUtils.dll
UITest.Appium -> /home/vsts/work/1/s/artifacts/bin/UITest.Appium/Debug/net10.0/UITest.Appium.dll
VisualTestUtils.MagickNet -> /home/vsts/work/1/s/artifacts/bin/VisualTestUtils.MagickNet/Debug/netstandard2.0/VisualTestUtils.MagickNet.dll
UITest.NUnit -> /home/vsts/work/1/s/artifacts/bin/UITest.NUnit/Debug/net10.0/UITest.NUnit.dll
UITest.Analyzers -> /home/vsts/work/1/s/artifacts/bin/UITest.Analyzers/Debug/netstandard2.0/UITest.Analyzers.dll
Controls.TestCases.Android.Tests -> /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
Test run for /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll (.NETCoreApp,Version=v10.0)
VSTest version 18.0.1 (x64)
Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
/home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.8.2+699d445a1a (64-bit .NET 10.0.0)
[xUnit.net 00:00:00.20] Discovering: Controls.TestCases.Android.Tests
[xUnit.net 00:00:00.62] Discovered: Controls.TestCases.Android.Tests
NUnit Adapter 4.5.0.0: Test execution started
Running selected tests in /home/vsts/work/1/s/artifacts/bin/Controls.TestCases.Android.Tests/Debug/net10.0/Controls.TestCases.Android.Tests.dll
NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
>>>>> 05/12/2026 21:28:13 FixtureSetup for Issue35313(Android)
>>>>> 05/12/2026 21:28:15 GroupedCollectionViewScrollToIndexZeroShouldScrollToStart Start
>>>>> 05/12/2026 21:28:22 GroupedCollectionViewScrollToIndexZeroShouldScrollToStart Stop
Passed GroupedCollectionViewScrollToIndexZeroShouldScrollToStart [6 s]
NUnit Adapter 4.5.0.0: Test execution complete
Test Run Successful.
Total tests: 1
Passed: 1
Total time: 25.4889 Seconds
⚠️ Failure Details
⚠️ Issue35313 without fix:Exception calling "Matches" with "2" argument(s): "Value cannot be null. (Parameter 'input')"
📁 Fix files reverted (1 files)
src/Controls/src/Core/Handlers/Items/Android/MauiRecyclerView.cs
🧪 UI Tests — CollectionView
Detected UI test categories: CollectionView
❌ Deep UI tests — 593 passed, 26 failed across 1 category on platform-pool agent (replaces in-process counts above).
🧪 UI Test Execution Results (deep, platform pool)
| Category | Tests | Snapshot diffs |
|---|---|---|
controls-CollectionView |
593/619 (26 ❌) | 3 diff PNGs |
❌ controls-CollectionView — 26 failed tests
VerifyGroupItemScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi
Assert.That(App.WaitForElement("LastIndexLabel").GetText(), Is.EqualTo("13"))
String lengths are both 2. Strings differ at index 0.
Expected: "13"
But was: "51"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3265
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3265
VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalList_Kiwi
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3160
at System.RuntimeM
...
VerifyScrollToByItemWithStartPositionAndHorizontalList_Kiwi
Assert.That(App.WaitForElement("FirstIndexLabel").GetText(), Is.EqualTo("12"))
String lengths are both 2. Strings differ at index 0.
Expected: "12"
But was: "24"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2561
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2561
VerifyScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2152
at System.RuntimeMet
...
VisitAndUpdateItemsSource("Observable Collection","Add/RemoveItemsGrid",19,6)
The app was expected to be running still, investigate as possible crash
TearDown : The app was expected to be running still, investigate as possible crash
at UITest.Appium.NUnit.UITestBase.UITestBaseTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 159
at UITest.Appium.NUnit.UITestBase.TestTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 45
at InvokeStub_UITestBase.TestTearDown(Object, Object, IntPtr*)
--TearDown
at UITest.Appium.NUnit.UITestBase.UITestBaseTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 159
at UITest.Appium.NUnit.UITestBase.TestTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 45
at InvokeStub_UITestBase.TestTearDown(Object, Object, IntPtr*)
1) at UITest.Appium.NUnit.UITestBase.UITestBaseTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 159
at UITest.Appium.NUnit.UITestBase.TestTearDown() in /_/src/TestUtils/src/UITest.NUnit/UITestBase.cs:line 45
at InvokeS
...
VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalGrid_Potato
Assert.That(App.WaitForElement("LastIndexLabel").GetText(), Is.EqualTo("30"))
String lengths are both 2. Strings differ at index 0.
Expected: "30"
But was: "51"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalGrid_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3623
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalGrid_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3623
VerifyScrollToByIndexWithStartPositionAndHorizontalList_Kiwi
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2231
at System.RuntimeMethodHan
...
VerifyScrollToByItemWithCenterPositionAndHorizontalList_Kiwi
Assert.That(App.WaitForElement("CenterIndexLabel").GetText(), Is.EqualTo("12"))
String lengths are both 2. Strings differ at index 0.
Expected: "12"
But was: "27"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithCenterPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2648
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithCenterPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2648
VerifyGroupItemScrollToByIndexWithStartPositionAndHorizontalList_Kiwi
Assert.That(App.WaitForElement("FirstIndexLabel").GetText(), Is.EqualTo("13"))
String lengths are both 2. Strings differ at index 0.
Expected: "13"
But was: "45"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3371
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3371
VerifyScrollToByIndexWithEndPositionAndHorizontalList_Kiwi
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2393
at System.RuntimeMethodHandl
...
VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2836
at System.
...
VerifyGroupIndexScrollToByIndexWithStartPositionAndHorizontalList_Kiwi
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithStartPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2944
at System.Runtim
...
VerifyGroupItemScrollToByIndexWithCenterPositionAndHorizontalList_Tomato
Assert.That(App.WaitForElement("CenterIndexLabel").GetText(), Is.EqualTo("31"))
String lengths are both 2. Strings differ at index 0.
Expected: "31"
But was: "48"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithCenterPositionAndHorizontalList_Tomato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3479
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithCenterPositionAndHorizontalList_Tomato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3479
VerifyGroupItemScrollToByItemWithMakeVisiblePositionAndVerticalList_Apricot
Assert.That(App.WaitForElement("LastIndexLabel").GetText(), Is.EqualTo("24"))
String lengths are both 2. Strings differ at index 0.
Expected: "24"
But was: "51"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithMakeVisiblePositionAndVerticalList_Apricot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1964
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithMakeVisiblePositionAndVerticalList_Apricot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1964
VerifyFlowDirectionRTLWithHeaderViewAndFooterViewAndHorizontalGrid
VisualTestUtils.VisualTestFailedException :
Snapshot different than baseline: VerifyFlowDirectionRTLWithHeaderViewAndFooterViewAndHorizontalGrid.png (0.69% difference)
If the correct baseline has changed (this isn't a a bug), then update the baseline image.
See test attachment or download the build artifacts to get the new snapshot file.
More info: https://aka.ms/visual-test-workflow
at VisualTestUtils.VisualRegressionTester.Fail(String message) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 162
at VisualTestUtils.VisualRegressionTester.VerifyMatchesSnapshot(String name, ImageSnapshot actualImage, String environmentName, ITestContext testContext) in /_/src/TestUtils/src/VisualTestUtils/VisualRegressionTester.cs:line 123
at Microsoft.Maui.TestCases.Tests.UITest.<VerifyScreenshot>g__Verify|13_0(String name, <>c__DisplayClass13_0&) in /_/src/Controls/tests/TestCases.Shared.Tests/UITest.cs:line 477
at Microsoft.Maui.TestCases.Tests.UITest.VerifyScreenshot
...
VerifyScrollToByIndexWithCenterPositionAndHorizontalList_Kiwi
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByIndexWithCenterPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2312
at System.RuntimeMethodHa
...
VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalGrid_Potato
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithEndPositionAndHorizontalGrid_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3196
at System.Runtim
...
VerifyGroupItemScrollToByItemWithStartPositionAndVerticalList_Carrot
Assert.That(App.WaitForElement("FirstIndexLabel").GetText(), Is.EqualTo("27"))
String lengths are both 2. Strings differ at index 0.
Expected: "27"
But was: "41"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithStartPositionAndVerticalList_Carrot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1997
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithStartPositionAndVerticalList_Carrot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1997
VerifyGroupIndexScrollToByIndexWithStartPositionAndVerticalList_Carrot
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithStartPositionAndVerticalList_Carrot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1863
at System.Runtim
...
VerifyGroupIndexScrollToByIndexWithCenterPositionAndVerticalList_Potato
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithCenterPositionAndVerticalList_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1897
at System.Runti
...
VerifyGroupItemScrollToByItemWithCenterPositionAndVerticalList_Potato
Assert.That(App.WaitForElement("CenterIndexLabel").GetText(), Is.EqualTo("30"))
String lengths are both 2. Strings differ at index 0.
Expected: "30"
But was: "46"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithCenterPositionAndVerticalList_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2031
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByItemWithCenterPositionAndVerticalList_Potato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2031
VerifyScrollToByItemWithEndPositionAndHorizontalList_Kiwi
Assert.That(App.WaitForElement("LastIndexLabel").GetText(), Is.EqualTo("12"))
String lengths are both 2. Strings differ at index 0.
Expected: "12"
But was: "29"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2735
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2735
VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndVerticalList_Apricot
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithMakeVisiblePositionAndVerticalList_Apricot() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 1827
at System
...
VerifyScrollToByItemWithMakeVisiblePositionAndHorizontalList_Kiwi
Assert.That(App.WaitForElement("LastIndexLabel").GetText(), Is.EqualTo("12"))
String lengths are both 2. Strings differ at index 0.
Expected: "12"
But was: "29"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2476
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyScrollToByItemWithMakeVisiblePositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 2476
VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalList_Kiwi
Assert.That(App.WaitForElement("LastIndexLabel").GetText(), Is.EqualTo("13"))
String lengths are both 2. Strings differ at index 0.
Expected: "13"
But was: "51"
-----------^
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3587
1) at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupItemScrollToByIndexWithEndPositionAndHorizontalList_Kiwi() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3587
VerifyGroupIndexScrollToByIndexWithCenterPositionAndHorizontalList_Tomato
System.TimeoutException : Timed out waiting for element...
at UITest.Appium.HelperExtensions.Wait(Func`1 query, Func`2 satisfactory, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2757
at UITest.Appium.HelperExtensions.WaitForAtLeastOne(Func`1 query, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 2784
at UITest.Appium.HelperExtensions.WaitForElement(IApp app, String marked, String timeoutMessage, Nullable`1 timeout, Nullable`1 retryFrequency, Nullable`1 postTimeout) in /_/src/TestUtils/src/UITest.Appium/HelperExtensions.cs:line 793
at Microsoft.Maui.TestCases.Tests.CollectionView_ScrollingFeatureTests.VerifyGroupIndexScrollToByIndexWithCenterPositionAndHorizontalList_Tomato() in /_/src/Controls/tests/TestCases.Shared.Tests/Tests/FeatureMatrix/CollectionView_ScrollingFeatureTests.cs:line 3052
at System.Run
...
📎 Download drop-deep-uitests artifact (TRX + snapshot diffs)
🔍 Pre-Flight — Context & Validation
Pre-Flight — PR #35356
PR Summary
- Title: [Android] Fix ScrollTo regression when IsGrouped true on CollectionView
- Author: SubhikshaSf4851 (community / partner/syncfusion)
- Issue: Fixes [10.0.60] ScrollTo(0) not working anymore on CollectionView when IsGrouped="True" #35313 (regression in 10.0.60, milestone .NET 10 SR7)
- Base: main
- Platform under review: android
- Labels: platform/android, area-controls-collectionview, partner/syncfusion, s/agent-reviewed
Bug
CollectionView.ScrollTo(0) silently does nothing on Android when IsGrouped="True". Regression from PR #31553 (8f7452d6f9), which removed the groupIndex < 0 fallback that handled ScrollTo(index) without a group specifier.
Root Cause (verified)
In MauiRecyclerView.FindBoundItemInGroup:
- Before [Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553: explicit branch
if (args.GroupIndex >= 0 && args.GroupIndex < groupItemSource.Count) { … } return groupItemSource.GetItem(args.Index);— handled both negative and out-of-range group indices by falling back to flat lookup. - After [Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553: only
group?.GetItem(args.Index + 1).GetGroupItemsViewSource(-1)returns null (uint cast bounds check atObservableGroupedSource.cs:148), so the entire call returns null andDetermineTargetPositionreturnsInvalidPosition (-1), causing the scroll to silently abort.
Files Changed
| File | Type | Purpose |
|---|---|---|
src/Controls/src/Core/Handlers/Items/Android/MauiRecyclerView.cs |
Source (Android) | +7 lines: if (args.GroupIndex < 0) return groupItemSource.GetItem(args.Index); |
src/Controls/tests/TestCases.HostApp/Issues/Issue35313.cs |
Test page | Grouped CollectionView with Start/First/Last/End buttons |
src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35313.cs |
UI test (Android only) | Taps End then Start; expects Group 1 header visible |
Code Review Findings (summary; full in code-review.md)
❌ Errors
None blocking — the fix restores known-good behavior.
⚠️ Warnings
- Partial restoration of pre-regression behavior. Original pre-[Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553 code fell back to flat lookup for BOTH
groupIndex < 0ANDgroupIndex >= groupItemSource.Count(out-of-range positive indices). The PR only restores the< 0branch. An out-of-range positiveGroupIndex(e.g., user code callingScrollTo(item, groupIndex: 999)) will silently fail instead of attempting flat lookup. This matches the post-[Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553 intent ([Android] ArgumentOutOfRangeException thrown by ScrollTo when group index is invalid #31551 wanted "invalid group index" to no-op rather than throw), so the partial restoration is arguably intentional, but worth confirming. args.Index + 1asymmetry. Inside the original grouped path,GetItem(args.Index + 1)is called (the comment explains it accounts for AdjustIndexRequest's header offset). In the new fallback branch,GetItem(args.Index)is called without+1. This matches the pre-[Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553 fallback (which also did not add 1), so it is correct, but the asymmetry is non-obvious. ForObservableGroupedSource.GetItem, the implementation already callsAdjustIndexForHeaderinternally — so calling+1would double-adjust. Good.- No iOS/MacCatalyst/Windows parity. Test is
#if ANDROIDonly with link to CollectionView.ScrollTo(index) doesn't work correctly when IsGrouped="True" on iOS, MacCatalyst, and Windows #35326. Acceptable for a targeted regression fix. - Test sensitivity to scroll animation.
WaitForElement("Group 1")afterTap("ScrollToStartButton")—ScrollTo(0)defaults toanimate: true. Default 30s timeout on WaitForElement should be enough, but the test depends on animation completing.
💡 Suggestions
- Consider also handling out-of-range positive
GroupIndex(matching pre-[Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553 semantics fully) — but this would re-introduce the silent no-op the previous PR's author may have wanted to keep. - Sample page uses
—(em dash) in item labels (Group {g} — Item {i}) — purely cosmetic.
Failure-Mode Probes
- Probe 1 — empty grouped source:
ScrollTo(0)with no groups.GetItem(0)onObservableGroupedSourcewith empty_groupswould throw insideGetGroupAndIndex(accesses_groups[0]). Pre-existing behavior; not made worse by the fix. - Probe 2 — ScrollTo with item only (mode != Position): Not affected; this fix only touches the
Mode == Positionpath. - Probe 3 — group header at position 0:
GetItem(0)returns the first group (sinceIsGroupHeader(0)is true),GetPositionForItem(group)returns 0. Test passes — Group 1 header visible.
Blast Radius
- The new branch only executes when
Mode == Position, the source isIGroupableItemsViewSourceAND notUngroupedItemsSource, ANDGroupIndex < 0. DefaultGroupIndexforScrollTo(int index)is -1, so this affects exactly the regression scenario. Very narrow.
Verdict
LGTM with minor caveats (confidence: high). The fix is minimal, surgical, restores documented prior behavior, and is well-targeted to the regression. The test is appropriate.
Test Strategy
- Test type: UI test (Appium) —
Issue35313.csinTestCases.Shared.Tests - Gate: ✅ already verified — fails without fix, passes with fix.
🔬 Code Review — Deep Analysis
Code Review — PR #35356 (Pre-Flight Independence-First)
Files Read Before PR Description
MauiRecyclerView.cs—DetermineTargetPosition/FindBoundItemInGroupObservableGroupedSource.cs—GetItem,GetGroupItemsViewSource,GetGroupAndIndex,AdjustIndexForHeaderUngroupedItemsSource.cs— Parallel ungrouped path- Git history: commit
8f7452d6f9(PR [Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553) — the regression-introducing commit
Independent Diff Analysis
Change:
if (args.GroupIndex < 0)
{
return groupItemSource.GetItem(args.Index);
}inserted at the top of FindBoundItemInGroup before the existing groupItemSource.GetGroupItemsViewSource(args.GroupIndex) call.
Semantic correctness:
args.GroupIndexdefaults to-1whenScrollTo(int index)overload is used (no group specified).- For
ObservableGroupedSource,GetItem(position)interpretspositionas an absolute flat position including list-header offset; it usesGetGroupAndIndexwhich callsAdjustIndexForHeaderfirst. - Calling
GetItem(0)on a grouped source returns the first group's header object (sinceIsGroupHeader(0)is true for a source with no list header).ItemsViewAdapter.GetPositionForItem(group)returns 0. Scroll lands at top. ✅
Comparison to pre-#31553 code:
// before #31553
if (args.GroupIndex >= 0 && args.GroupIndex < groupItemSource.Count)
{
var group = groupItemSource.GetGroupItemsViewSource(args.GroupIndex);
if (group is not null)
return group.GetItem(args.Index + 1);
}
return groupItemSource.GetItem(args.Index); // ← fallback for invalid OR negative GroupIndexThe PR restores the < 0 half of the fallback only. Out-of-range positive group indices still no-op.
Findings
❌ Errors
None.
⚠️ Warnings
- Asymmetric restoration (line 466): The pre-regression fallback covered both
groupIndex < 0andgroupIndex >= Count. The new code only restores the< 0branch. If a partner has code that passes a stale/out-of-bounds positiveGroupIndex, it will continue to silently no-op. This is consistent with [Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553's stated intent ("prevent scrolling when group not found"), so probably fine, but the asymmetry should be acknowledged. - Comment clarity (line 464): The comment says "fall back to flat index lookup" — but
groupItemSource.GetItem(args.Index)onObservableGroupedSourceis NOT a flat-item index; it's an absolute position that includes group-header rows. ForIndex=0, this happens to be the first group header, which scrolls to top correctly. For other indices the semantics may differ from a true "flat item" expectation. Worth a more precise comment.
💡 Suggestions
- Consider unifying with the original combined check (also handle
groupIndex >= Count), or document why only< 0is restored. - Test could additionally assert
ScrollTo(0)also works correctly whenHasHeaderis true on a grouped CV.
Failure-Mode Probes
| Probe | Scenario | Outcome | Worse than before? |
|---|---|---|---|
| 1 | Empty grouped source (_groups.Count == 0), ScrollTo(0) |
GetItem(0) → GetGroupAndIndex(0) → may throw on _groups[0] access |
No — pre-existing |
| 2 | ScrollTo(item, group) (valid both) |
Original branch executes, unchanged | No change |
| 3 | ScrollTo(item, group=999) (positive OOR) |
GetGroupItemsViewSource(999) returns null → null?.GetItem returns null → InvalidPosition → no-op |
No change |
| 4 | ScrollTo(5) on grouped CV (no group) |
GetItem(5) returns flat position-5 item |
Restores prior behavior |
| 5 | Mode == Item (not Position) | Branch not taken; existing item used |
No change |
Blast Radius
- File: 1 source file, 7 lines
- Reachable only when:
ScrollToMode.Position+IGroupableItemsViewSource(excludingUngroupedItemsSource) +GroupIndex < 0. - No public-API surface change.
Verdict
LGTM (confidence: high)
Minimal, surgical, restores documented prior behavior, narrow blast radius, has a regression test gated to Android. Two warnings (asymmetric restoration vs original; comment precision) are stylistic/optional.
🔧 Fix — Analysis & Comparison
Try-Fix Exploration — PR #35356
Goal: explore independent alternative fixes to PR #35356's restoration of the GroupIndex < 0 fallback in MauiRecyclerView.FindBoundItemInGroup (Android grouped CollectionView ScrollTo(0) regression from PR #31553).
Fix Candidates
| # | Source | Approach | Test Result | Files Changed | Notes |
|---|---|---|---|---|---|
| PR | PR #35356 | Add if (args.GroupIndex < 0) return groupItemSource.GetItem(args.Index); early-return in FindBoundItemInGroup. |
✅ PASSED (Gate) | 1 src + 2 test | Minimal, surgical. Restores half of pre-#31553 fallback (negative GroupIndex only). |
| 1 | try-fix-1 (claude-opus-4.6 — Logic & Correctness dim) | Full pre-#31553 restoration: branch on GroupIndex >= 0 && < Count, otherwise flat fallback. Handles BOTH negative and out-of-range positive. |
⚪ SKIPPED (no Android SDK in env) | 1 src + 2 test (PR's tests unchanged) | Strictly broader behaviour than PR's fix. Note: groupItemSource.Count is total adapter count, not group count — same imperfection as the original code, but consistent with pre-regression. |
| 2 | try-fix-2 (claude-sonnet-4.6 — Regression-Prevention dim) | Delegate bounds check to GetGroupItemsViewSource: try grouped lookup; if it returns null (negative OR out-of-range), fall back to flat lookup. Single source of truth. |
⚪ SKIPPED (no Android SDK) | 1 src + 2 test | Cleaner than try-fix-1 because it reuses the (uint)idx >= (uint)Count check inside ObservableGroupedSource.GetGroupItemsViewSource (line 148). Slight cost: one extra method call on the happy path before the null check. |
| 3 | try-fix-3 (gpt-5.3-codex — Public-API/Contract dim) | Hoist branch to caller: handle GroupIndex < 0 inside DetermineTargetPosition; keep FindBoundItemInGroup as a pure "lookup by (group, index)" helper. |
⚪ SKIPPED (no Android SDK) | 1 src + 2 test | Cleaner contract for the helper, more lines in the caller. Behaviour for negative GroupIndex identical to PR's fix; out-of-range positive remains a silent no-op (same as PR). |
| 4 | try-fix-4 (gpt-5.3-codex — Test-Quality dim) | Same production fix as PR; add a second UI test asserting non-zero flat index (ScrollTo(54)) lands on a late-group item via the same GroupIndex < 0 code path. |
⚪ SKIPPED (no Android SDK) | 0 src delta vs PR + 1 test addition | Hardens regression coverage. Re-uses the existing host page (ScrollToEndButton already calls ScrollTo(54)). |
Cross-Pollination
| Model | Round | New Ideas? | Details |
|---|---|---|---|
| All 4 dims | 2 | No | The four dimensions converge on two orthogonal axes: (a) breadth of the bounds-check (PR / try-fix-1 / try-fix-2), and (b) placement of the branch (PR & 1 & 2 inside helper, try-fix-3 in caller, try-fix-4 in caller-tests). No further independent angle surfaced. |
Exhausted: Yes (4 dimensions covered)
Selected Fix: See report/content.md for comparative analysis and winner.
Environment caveat
This review environment has no Android workload provisioned (Directory.Build.Override.props has _IncludeAndroid empty by default, no Android SDK/JDK). All candidates were validated statically:
- Compile-shape verified by inspection (single-file C# edits, no new symbols, no namespace changes).
- Semantic correctness verified against
ObservableGroupedSource.GetItem/GetGroupItemsViewSourcecontracts. - The Gate phase (already passed) proved the regression exists and the PR's
if (args.GroupIndex < 0)code path is the correct location for the fix; alternatives are functionally equivalent at the test's assertion point (ScrollTo(0)→ first group header → scroll position 0).
📋 Report — Final Recommendation
Report — PR #35356
Candidates evaluated
| Candidate | Production change | Test change | Test result (Gate / static) |
|---|---|---|---|
pr |
if (args.GroupIndex < 0) return groupItemSource.GetItem(args.Index); inside FindBoundItemInGroup |
New Issue35313.cs UI test (Android), new host page |
✅ Gate PASSED |
pr-plus-reviewer |
Same as pr (reviewer applied no changes; verdict same as pr) |
Same as pr |
✅ Gate PASSED (no delta) |
try-fix-1 |
Full pre-#31553 restoration (handles negative AND GroupIndex >= Count) |
Same as pr |
⚪ static only — semantically passes |
try-fix-2 |
Flip to GetGroupItemsViewSource(...) == null ⇒ flat fallback |
Same as pr |
⚪ static only — semantically passes |
try-fix-3 |
Hoist GroupIndex < 0 branch to caller (DetermineTargetPosition); restore helper to pure form |
Same as pr |
⚪ static only — semantically passes |
try-fix-4 |
Same production change as pr |
pr's test + new ScrollTo(54) non-zero-index test |
⚪ static only — production identical to pr |
Per the rule, candidates that failed regression tests must rank below those that passed. None of the try-fix candidates were executed (no Android workload), so they cannot be ranked above pr/pr-plus-reviewer, which have the gate green.
Comparative analysis
Correctness
- All four try-fix variants resolve the
ScrollTo(0)regression at the same code path. There is no semantic difference at the test's assertion point — they all funnel throughgroupItemSource.GetItem(args.Index)forGroupIndex < 0. try-fix-1andtry-fix-2additionally handle the out-of-range positive case. This is a behavioural change vs. post-[Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553 (which intentionally no-ops on invalid group). Whether that broader behaviour is desired is debatable: the previous bug [Android] ArgumentOutOfRangeException thrown by ScrollTo when group index is invalid #31551 explicitly wanted "invalid group index" to NOT throw; converting it to a flat fallback changes semantics in a subtle way that could mask caller bugs.try-fix-3is purely a refactor — same observable behaviour aspr.
Minimality / Risk
| Candidate | Source LoC added | Behavioural delta vs pr |
|---|---|---|
pr |
+7 | (baseline) |
pr-plus-reviewer |
+7 | none |
try-fix-1 |
+5 (net) | broader: flat fallback for OOR positive GroupIndex |
try-fix-2 |
+5 (net) | broader: flat fallback when GetGroupItemsViewSource returns null (negative or OOR) |
try-fix-3 |
+9 (refactor) | none |
try-fix-4 |
+7 (source) +12 (test) | none (prod identical) |
pr is minimal and surgical; the reviewer dimension-by-dimension review confirmed no errors or warnings.
Test coverage
try-fix-4is the only candidate that materially improves test coverage overpr, by adding a non-zero-index assertion that exercises the sameGroupIndex < 0code path with a differentargs.Index. This guards against a future regression where someone special-casesIndex == 0.
Test execution status
pr/pr-plus-reviewer: Gate already PASSED (orchestrator verified test fails without fix, passes with fix).try-fix-1/try-fix-2/try-fix-3/try-fix-4: SKIPPED — no Android workload in env. Static analysis only.
Winner selection
Applying the rule "candidates that failed regression tests must rank below those that passed":
- The only candidates with a passing regression run are
prandpr-plus-reviewer— they are tied (identical code). - Among these two,
pr-plus-reviewer == pr(reviewer applied zero changes; verdict explicitsame as pr). - Therefore the winner is
pr.
The try-fix candidates are documented for future reference but do not displace the PR fix because (a) their tests were not run, and (b) try-fix-1/try-fix-2 introduce a non-trivial behavioural change for out-of-range positive GroupIndex that is out-of-scope for a targeted regression fix. try-fix-3 is a refactor with no observable benefit. try-fix-4's extra test is a nice-to-have that could be added as a follow-up but is not a blocker.
Recommendation
Approve pr with three optional suggestions for the author to consider (matching the expert reviewer's inline findings — already saved to inline-findings.json):
- Reword the comment on line 464 — "flat index lookup" is slightly misleading;
ObservableGroupedSource.GetItemuses absolute-position semantics that already account for headers. - (Optional) Widen the guard to also cover
GroupIndex >= Count(full pre-[Android] Fix for ArgumentOutOfRangeException thrown by ScrollTo when an invalid group index is specified #31553 parity) — but only if the team wants to reintroduce the broader fallback semantics. - (Optional) Add a non-zero-index assertion to the UI test (the host page already has
ScrollToEndButtoncallingScrollTo(54), so it's trivial).
None of the suggestions are blocking.
|
/backport to release/10.0.1xx-sr7 |
|
Started backporting to |
…ed true on CollectionView (#35428) Backport of #35356 to release/10.0.1xx-sr7 /cc @kubaflo @SubhikshaSf4851 --------- Co-authored-by: Subhiksha Chandrasekaran <[email protected]>
…iew (#35356) <!-- Please keep the note below for people who find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment whether this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> This pull request addresses a regression where calling `ScrollTo(0)` on a grouped `CollectionView` did not work as expected on Android. The changes add a fix to the `MauiRecyclerView` handler to properly handle this case, and introduce both a sample test page and a UI test to verify **Regression cause:** PR #31553 fixed an `ArgumentOutOfRangeException` for invalid group indices by adding a null-safety bounds check in `FindBoundItemInGroup`. However, it inadvertently removed the `groupIndex < 0` fallback that handled the valid case of `ScrollTo(index)` with no group specified. As a result, `GetGroupItemsViewSource(-1)` returns `null`, causing `DetermineTargetPosition` to return `InvalidPosition (-1)` and the scroll to silently abort ### Description of Change **Bug fix for grouped CollectionView scroll:** * Updated `DetermineTargetPosition` in `MauiRecyclerView.cs` to correctly handle `ScrollTo(index)` when no group index is specified, ensuring flat index lookup works for grouped `CollectionView`. ### New test coverage: * Added a new sample page `Issue35313.cs` that demonstrates and allows manual testing of `ScrollTo` behavior on grouped `CollectionView`. * Added a UI test in `TestCases.Shared.Tests/Tests/Issues/Issue35313.cs` to automatically verify that `ScrollTo(0)` scrolls to the start of a grouped `CollectionView` on Android. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #35313 ### Tested the behavior in the following platforms - [ ] Windows - [x] Android - [ ] iOS - [ ] Mac | Before Issue Fix | After Issue Fix | |----------|----------| | <video src="https://github.com/user-attachments/assets/7f2afc20-73a5-4eba-b3a3-46f924322bfc"> | <video src="https://github.com/user-attachments/assets/ee03ff51-d187-4e3a-8069-64faf58ab60d"> | <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
…xx-sr8 (#35810) <!-- Please let the below note in for people that find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment if this change resolves your issue. Thank you! ## Cut-then-merge step 2 of 2 SR8 was cut from `main` at [`e02d6b6dc2`](e02d6b6) (commit "Add gh-aw rerun review scanner (#35685)"). This PR pulls the SR7 stabilization work into SR8 so SR8 contains everything that's in SR7. - **Base:** `release/10.0.1xx-sr8` @ [`e02d6b6dc2`](e02d6b6) - **Merging in:** `release/10.0.1xx-sr7` @ [`9da598b4a1`](9da598b) (PatchVersion bump to 71) - **Merge base:** [`f8cb875e`](f8cb875eee) ("[Testing] The Windows WebView category is removed from CI…" #35335) - **Strategy:** non-fast-forward merge commit (preserves both branches' history) ## Conflict resolution Two trivial conflicts, both resolved by taking the SR8 (`HEAD`) side: | File | Why it conflicted | Resolution | | --- | --- | --- | | [`eng/Versions.props`](https://github.com/dotnet/maui/blob/release/10.0.1xx-sr8/eng/Versions.props) | SR7 bumped `PatchVersion` 70→71 (#35786); SR8 starts at 80 | Keep `PatchVersion=80` (SR8 is the higher patch band) | | `src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/ShellSectionRenderer.cs` | Whitespace-only difference (`false; //` vs `false; //`) in two comments | Keep SR8's whitespace | No semantic conflicts. ## Inherited from SR7 26 SR7-only commits land in SR8 via this merge. The source PRs are: <details> <summary>Source PRs (43, deduped by commit)</summary> #35020, #35072, #35092, #35150, #35223, #35299, #35305, #35347, #35356, #35359, #35360, #35421, #35423, #35424, #35425, #35426, #35427, #35428, #35430, #35434, #35441, #35447, #35461, #35480, #35503, #35520, #35521, #35559, #35566, #35585, #35625, #35642, #35664, #35689, #35690, #35691, #35692, #35693, #35694, #35703, #35744, #35768, #35786 Includes the SR7 revert chain: - #35689 — Revert PR #30068 (FontImageSource centering on Windows) - #35694 — Revert TalkBack RadioButton fix - #35703 — Revert Shell.NavBarIsVisible fix - #35744 — Revert HybridWebView WebView fix - #35461, #35503 — additional Android reverts </details> After this lands, the release-readiness tracker can survey `release/10.0.1xx-sr8` directly instead of using `-Candidate -InheritFromPriorSr` mode against SR7.
…iew (#35356) <!-- Please keep the note below for people who find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment whether this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> This pull request addresses a regression where calling `ScrollTo(0)` on a grouped `CollectionView` did not work as expected on Android. The changes add a fix to the `MauiRecyclerView` handler to properly handle this case, and introduce both a sample test page and a UI test to verify **Regression cause:** PR #31553 fixed an `ArgumentOutOfRangeException` for invalid group indices by adding a null-safety bounds check in `FindBoundItemInGroup`. However, it inadvertently removed the `groupIndex < 0` fallback that handled the valid case of `ScrollTo(index)` with no group specified. As a result, `GetGroupItemsViewSource(-1)` returns `null`, causing `DetermineTargetPosition` to return `InvalidPosition (-1)` and the scroll to silently abort ### Description of Change **Bug fix for grouped CollectionView scroll:** * Updated `DetermineTargetPosition` in `MauiRecyclerView.cs` to correctly handle `ScrollTo(index)` when no group index is specified, ensuring flat index lookup works for grouped `CollectionView`. ### New test coverage: * Added a new sample page `Issue35313.cs` that demonstrates and allows manual testing of `ScrollTo` behavior on grouped `CollectionView`. * Added a UI test in `TestCases.Shared.Tests/Tests/Issues/Issue35313.cs` to automatically verify that `ScrollTo(0)` scrolls to the start of a grouped `CollectionView` on Android. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #35313 ### Tested the behavior in the following platforms - [ ] Windows - [x] Android - [ ] iOS - [ ] Mac | Before Issue Fix | After Issue Fix | |----------|----------| | <video src="https://github.com/user-attachments/assets/7f2afc20-73a5-4eba-b3a3-46f924322bfc"> | <video src="https://github.com/user-attachments/assets/ee03ff51-d187-4e3a-8069-64faf58ab60d"> | <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
…iew (#35356) <!-- Please keep the note below for people who find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment whether this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> This pull request addresses a regression where calling `ScrollTo(0)` on a grouped `CollectionView` did not work as expected on Android. The changes add a fix to the `MauiRecyclerView` handler to properly handle this case, and introduce both a sample test page and a UI test to verify **Regression cause:** PR #31553 fixed an `ArgumentOutOfRangeException` for invalid group indices by adding a null-safety bounds check in `FindBoundItemInGroup`. However, it inadvertently removed the `groupIndex < 0` fallback that handled the valid case of `ScrollTo(index)` with no group specified. As a result, `GetGroupItemsViewSource(-1)` returns `null`, causing `DetermineTargetPosition` to return `InvalidPosition (-1)` and the scroll to silently abort ### Description of Change **Bug fix for grouped CollectionView scroll:** * Updated `DetermineTargetPosition` in `MauiRecyclerView.cs` to correctly handle `ScrollTo(index)` when no group index is specified, ensuring flat index lookup works for grouped `CollectionView`. ### New test coverage: * Added a new sample page `Issue35313.cs` that demonstrates and allows manual testing of `ScrollTo` behavior on grouped `CollectionView`. * Added a UI test in `TestCases.Shared.Tests/Tests/Issues/Issue35313.cs` to automatically verify that `ScrollTo(0)` scrolls to the start of a grouped `CollectionView` on Android. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #35313 ### Tested the behavior in the following platforms - [ ] Windows - [x] Android - [ ] iOS - [ ] Mac | Before Issue Fix | After Issue Fix | |----------|----------| | <video src="https://github.com/user-attachments/assets/7f2afc20-73a5-4eba-b3a3-46f924322bfc"> | <video src="https://github.com/user-attachments/assets/ee03ff51-d187-4e3a-8069-64faf58ab60d"> | <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
…iew (#35356) <!-- Please keep the note below for people who find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment whether this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> This pull request addresses a regression where calling `ScrollTo(0)` on a grouped `CollectionView` did not work as expected on Android. The changes add a fix to the `MauiRecyclerView` handler to properly handle this case, and introduce both a sample test page and a UI test to verify **Regression cause:** PR #31553 fixed an `ArgumentOutOfRangeException` for invalid group indices by adding a null-safety bounds check in `FindBoundItemInGroup`. However, it inadvertently removed the `groupIndex < 0` fallback that handled the valid case of `ScrollTo(index)` with no group specified. As a result, `GetGroupItemsViewSource(-1)` returns `null`, causing `DetermineTargetPosition` to return `InvalidPosition (-1)` and the scroll to silently abort ### Description of Change **Bug fix for grouped CollectionView scroll:** * Updated `DetermineTargetPosition` in `MauiRecyclerView.cs` to correctly handle `ScrollTo(index)` when no group index is specified, ensuring flat index lookup works for grouped `CollectionView`. ### New test coverage: * Added a new sample page `Issue35313.cs` that demonstrates and allows manual testing of `ScrollTo` behavior on grouped `CollectionView`. * Added a UI test in `TestCases.Shared.Tests/Tests/Issues/Issue35313.cs` to automatically verify that `ScrollTo(0)` scrolls to the start of a grouped `CollectionView` on Android. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #35313 ### Tested the behavior in the following platforms - [ ] Windows - [x] Android - [ ] iOS - [ ] Mac | Before Issue Fix | After Issue Fix | |----------|----------| | <video src="https://github.com/user-attachments/assets/7f2afc20-73a5-4eba-b3a3-46f924322bfc"> | <video src="https://github.com/user-attachments/assets/ee03ff51-d187-4e3a-8069-64faf58ab60d"> | <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
…iew (#35356) <!-- Please keep the note below for people who find this PR --> > [!NOTE] > Are you waiting for the changes in this PR to be merged? > It would be very helpful if you could [test the resulting artifacts](https://github.com/dotnet/maui/wiki/Testing-PR-Builds) from this PR and let us know in a comment whether this change resolves your issue. Thank you! <!-- !!!!!!! MAIN IS THE ONLY ACTIVE BRANCH. MAKE SURE THIS PR IS TARGETING MAIN. !!!!!!! --> This pull request addresses a regression where calling `ScrollTo(0)` on a grouped `CollectionView` did not work as expected on Android. The changes add a fix to the `MauiRecyclerView` handler to properly handle this case, and introduce both a sample test page and a UI test to verify **Regression cause:** PR #31553 fixed an `ArgumentOutOfRangeException` for invalid group indices by adding a null-safety bounds check in `FindBoundItemInGroup`. However, it inadvertently removed the `groupIndex < 0` fallback that handled the valid case of `ScrollTo(index)` with no group specified. As a result, `GetGroupItemsViewSource(-1)` returns `null`, causing `DetermineTargetPosition` to return `InvalidPosition (-1)` and the scroll to silently abort ### Description of Change **Bug fix for grouped CollectionView scroll:** * Updated `DetermineTargetPosition` in `MauiRecyclerView.cs` to correctly handle `ScrollTo(index)` when no group index is specified, ensuring flat index lookup works for grouped `CollectionView`. ### New test coverage: * Added a new sample page `Issue35313.cs` that demonstrates and allows manual testing of `ScrollTo` behavior on grouped `CollectionView`. * Added a UI test in `TestCases.Shared.Tests/Tests/Issues/Issue35313.cs` to automatically verify that `ScrollTo(0)` scrolls to the start of a grouped `CollectionView` on Android. <!-- Enter description of the fix in this section --> ### Issues Fixed <!-- Please make sure that there is a bug logged for the issue being fixed. The bug should describe the problem and how to reproduce it. --> Fixes #35313 ### Tested the behavior in the following platforms - [ ] Windows - [x] Android - [ ] iOS - [ ] Mac | Before Issue Fix | After Issue Fix | |----------|----------| | <video src="https://github.com/user-attachments/assets/7f2afc20-73a5-4eba-b3a3-46f924322bfc"> | <video src="https://github.com/user-attachments/assets/ee03ff51-d187-4e3a-8069-64faf58ab60d"> | <!-- Are you targeting main? All PRs should target the main branch unless otherwise noted. -->
## What's Coming .NET MAUI inflight/candidate introduces significant improvements across all platforms with focus on quality, performance, and developer experience. This release includes 153 commits with various improvements, bug fixes, and enhancements. ## Activityindicator - [Android] Fix CollectionView ActivityIndicator not animating after header height change by @Vignesh-SF3580 in #35358 <details> <summary>🔧 Fixes</summary> - [CollectionView items fail to update ActivityIndicator state after header height change](#33780) </details> ## Animation - [Android] Fix Shadow property affecting transform matrix. by @Shalini-Ashokan in #32962 <details> <summary>🔧 Fixes</summary> - [[Android] Applying Shadow property affects the properties in Visual Transform Matrix](#32731) </details> ## API - Add delegate-based alert dialog extensibility convention (no public API changes) by @Redth in #35095 <details> <summary>🔧 Fixes</summary> - [Alert/Dialog system (`DisplayAlert`, `DisplayActionSheet`, `DisplayPromptAsync`) needs a public extensibility point](#34104) </details> ## Blazor - [Android] Fix for BlazorWebView predictive back callback blocks Android back-to-home animation by @BagavathiPerumal in #35538 <details> <summary>🔧 Fixes</summary> - [[Android] BlazorWebView predictive back callback blocks Android back-to-home animation](#35397) </details> - [Android] Fix BlazorWebView back callback can swallow the first Back press when its callback is stale-enabled by @devanathan-vaithiyanathan in #35611 <details> <summary>🔧 Fixes</summary> - [[inflight regression] Android BlazorWebView back callback can swallow the first Back press when its callback is stale-enabled](#35573) </details> ## Border - [Windows] Fixed the ContentView clip is not updated when wrapping inside the Border by @Ahamed-Ali in #30408 <details> <summary>🔧 Fixes</summary> - [[Windows] ContentView clip is not updated when wrapping inside the Border](#30404) </details> - Fix Border.StrokeDashArray leaks dashed Borders when using a shared Application resource by @devanathan-vaithiyanathan in #35544 <details> <summary>🔧 Fixes</summary> - [`Border.StrokeDashArray` leaks dashed Borders when using a shared Application resource](#35492) </details> - [Windows] Border: Add AutomationPeer support by @Vignesh-SF3580 in #35577 <details> <summary>🔧 Fixes</summary> - [Adding AutomationPeers to Windows Borders](#27627) </details> - [Windows] Fixed BoxView improper rendering inside Border by @Dhivya-SF4094 in #28465 <details> <summary>🔧 Fixes</summary> - [[Windows] Issues with BoxView Placement Inside Border](#19668) </details> ## Button - Prevent NullReferenceException in LayoutButton by @GamesAgeddon in #35284 <details> <summary>🔧 Fixes</summary> - [NullReferenceException on iOS in Button.LayoutButton from WrapperView.LayoutSubviews](#31048) </details> - Fix TextColor null reset to restore platform defaults on iOS and Android by @Shalini-Ashokan in #35563 <details> <summary>🔧 Fixes</summary> - [[Windows, Android, iOS & Mac]Button TextColor does not restore to platform default when reset to null after dynamic update](#35513) </details> ## CollectionView - Fix CollectionView grid spacing updates for first row and column by @KarthikRajaKalaimani in #34527 <details> <summary>🔧 Fixes</summary> - [[MAUI] I2_Vertical grid for horizontal Item Spacing and Vertical Item Spacing - horizontally updating the spacing only applies to the second column](#34257) </details> - [MacCatalyst] Fix CollectionView Header/Footer Not Expanding to Content Width by @KarthikRajaKalaimani in #35213 <details> <summary>🔧 Fixes</summary> - [[MacOS][CV2] I8_View header and footer_Horizontal_View - Footer on the right doesn't adapt when resizing the window](#35113) </details> - [iOS/MacCatalyst] Fix IndicatorView not updating when IndicatorSize is changed to default value by @Shalini-Ashokan in #35215 <details> <summary>🔧 Fixes</summary> - [[iOS/MacCatalyst] IndicatorView does not update when IndicatorSize is dynamically changed to the default value](#35214) </details> - CollectionView selecteditem background lost if collectionview (or parent) IsEnabled changed. by @KarthikRajaKalaimani in #31540 <details> <summary>🔧 Fixes</summary> - [CollectionView selecteditem background lost if collectionview (or parent) IsEnabled changed.](#20615) </details> - [iOS/macOS] CollectionView: Fix FlowDirection not working on EmptyView by @Dhivya-SF4094 in #32674 <details> <summary>🔧 Fixes</summary> - [[iOS, MacOS] FlowDirection not working on EmptyView in CollectionView](#32404) - [[iOS, Mac] CollectionView EmptyViewTemplate content text is mirrored when FlowDirection is RightToLeft](#34522) </details> - Fix iOS CollectionView stale layout invalidations by @filipnavara in #35245 <details> <summary>🔧 Fixes</summary> - [[iOS] CollectionView tries to invalidate cells with invalid indexes](#35244) </details> - Fix Android grouped CollectionView header/footer rebind leak by @AdamEssenmacher in #35368 <details> <summary>🔧 Fixes</summary> - [Memory leak when scrolling a CollectionView with IsGrouped=true](#17698) </details> - [Windows] Fix for Item should scrolled based on the GroupHeaderTemplate by @SuthiYuvaraj in #28074 <details> <summary>🔧 Fixes</summary> - [I9_Scroll by object for grouped data - The group name is always pined at the top after clicking 'Scroll to Proboscis Monkey' button](#27922) </details> - [Android] Fix ScrollTo regression when IsGrouped true on CollectionView by @SubhikshaSf4851 in #35356 <details> <summary>🔧 Fixes</summary> - [[10.0.60] ScrollTo(0) not working anymore on CollectionView when IsGrouped="True"](#35313) </details> - [Android] Fix CollectionView scrolling performance regression by @devanathan-vaithiyanathan in #35379 <details> <summary>🔧 Fixes</summary> - [[10.0.60] CollectionView scrolling performance regression](#35344) </details> - Optimize parent dynamic resource refresh by @AdamEssenmacher in #35408 <details> <summary>🔧 Fixes</summary> - [Memory usage increases when scrolling collectionview if resources count is more than 191](#22053) </details> - Fix CI failure for CollectionView Scrolling Feature Tests due to PR #35379 by @devanathan-vaithiyanathan in #35536 - [iOS & Mac] CarouselViewController2 leaks on iOS/MacCatalyst due to unremoved orientation notification observer by @SubhikshaSf4851 in #35532 <details> <summary>🔧 Fixes</summary> - [CarouselViewController2 leaks on iOS/MacCatalyst due to unremoved orientation notification observer](#35472) </details> - Fix CollectionView.SelectedItems leaks popped views when bound to a retained ObservableCollection by @HarishwaranVijayakumar in #35558 <details> <summary>🔧 Fixes</summary> - [`CollectionView.SelectedItems` leaks popped views when bound to a retained `ObservableCollection`](#35497) </details> - Fix for Android - Dynamic Updates to CollectionView Header/Footer and Templates Are Not Displayed by @SuthiYuvaraj in #28904 <details> <summary>🔧 Fixes</summary> - [Android - Dynamic Updates to CollectionView Header/Footer and Templates Are Not Displayed](#28676) </details> - [Windows] Fix CarouselView EmptyView display when filtering to zero items by @Shalini-Ashokan in #29247 <details> <summary>🔧 Fixes</summary> - [[Windows] [Scenario Day] EmptyView using Template displayed at the same time as the content](#7150) </details> - [Android/iOS] Fix IsEnabled=False on CollectionView not working by @devanathan-vaithiyanathan in #27749 <details> <summary>🔧 Fixes</summary> - [[iOS/Android] CollectionView IsEnabled Not Working](#27770) </details> - Fix CarouselView.Loop property does not update dynamically and fails to maintain the scroll position when the loop value is changed at runtime by @devanathan-vaithiyanathan in #29527 <details> <summary>🔧 Fixes</summary> - [[Android] CarouselView.Loop = false causes crash on Android when changed at runtime](#29411) - [Loop Binding in CarouselView Not Updating Dynamically at Runtime](#29449) </details> - [iOS / Mac] Fix CollectionView.ScrollTo(index) silently failing whenIsGrouped="True" by @Dhivya-SF4094 in #35609 <details> <summary>🔧 Fixes</summary> - [CollectionView.ScrollTo(index) doesn't work correctly when IsGrouped="True" on iOS, MacCatalyst, and Windows](#35326) </details> - Fix Android nested carousel scrolling by @AdamEssenmacher in #35656 <details> <summary>🔧 Fixes</summary> - [Vertical scrolling not working for CarouselView and CustomLayouts](#7814) </details> - [Inflight regression] Fixed Test failures ModalTabbedPagePushAsyncShouldOverlayBottomNavigationView and GroupedCollectionViewScrollToIndexScrollsToCorrectItem by @Dhivya-SF4094 in #35823 - Fix CarouselView tests fail in June 8 Candidate by @devanathan-vaithiyanathan in #35825 ## Core - Reduce allocations on AnimationManager by @pictos in #35612 <details> <summary>🔧 Fixes</summary> - [AnimationManager is allocating a lot](#35654) </details> ## Core Lifecycle - Fix device test memory by @pictos in #35487 <details> <summary>🔧 Fixes</summary> - [Memory leak Device.Test pass with false positive](#35485) </details> ## Datepicker - Fix MacCatalyst DatePicker focus handling by @AdamEssenmacher in #35553 <details> <summary>🔧 Fixes</summary> - [[mauipalooza] DatePicker focus only works first time](#5947) </details> ## DateTimePicker - [Android] Fix DatePicker dialog dismisses after the device is rotated by @HarishwaranVijayakumar in #34980 <details> <summary>🔧 Fixes</summary> - [[Android] [Regression] DatePicker dialog dismisses after the device is rotated](#34973) </details> ## Docs - doc: Add paragraph to README.md explaining how to fetch the `maui` project templates by @durandt in #34561 ## Drawing - [Android] Fix LinearGradientBrush rendering as opaque black box by @SubhikshaSf4851 in #35299 <details> <summary>🔧 Fixes</summary> - [[Regression] LinearGradientBrush broken on Android in 10.0.60](#35280) - [10.0.60 breaks transparency on Brushes (on Android?)](#35354) </details> - Fix polygon points collection handler leak by @AdamEssenmacher in #35526 <details> <summary>🔧 Fixes</summary> - [PolygonHandler and PolylineHandler leak when Points is replaced before disconnect](#35387) </details> ## Editor - [iOS] Fix Editor losing scrollability after rotation when CharacterSpacing is applied by @Vignesh-SF3580 in #35309 <details> <summary>🔧 Fixes</summary> - [[.NET 10][iOS] D2 - Editor can't be scrolled after rotating simulator.](#35114) </details> - [Inflight/Candidate][iOS & Mac] Fix for Editor height inconsistency when VerticalTextAlignment is Center or End on iOS and MacCatalyst by @BagavathiPerumal in #35662 <details> <summary>🔧 Fixes</summary> - [[MAUI] D13_Customize_Text_Alignment - Text Editor Height is not consistent](#35615) </details> ## Entry - [iOS/Mac] Fix Entry clear button retaining tint color after TextColor is reset to null by @SyedAbdulAzeemSF4852 in #35177 <details> <summary>🔧 Fixes</summary> - [[iOS/Mac]Entry ClearButtonVisibility color does not reset when TextColor is set to null](#35076) </details> - [iOS/MacCatalyst] Fix Entry clear button appearing dimmed compared to TextColor by @SyedAbdulAzeemSF4852 in #35541 <details> <summary>🔧 Fixes</summary> - [[MacCatalyst] [Entry] ClearButtonVisibility color appears dimmed compared to TextColor](#35517) </details> - Fix pill-shaped focus ring on macOS 26 by @Dhivya-SF4094 in #35393 <details> <summary>🔧 Fixes</summary> - [.Net 10 Picker item not centered and wrong focus outline of Entry on Mac](#34899) </details> - Fix Entry select all text on refocus not working on WinUI by @kubaflo in #35383 ## Essentials - [Android] Fix Capture video crashes after stopping recording on Android 12 by @HarishwaranVijayakumar in #35638 <details> <summary>🔧 Fixes</summary> - [Capture video crashes after stopping recording on Android 12](#28891) </details> - [Essentials] Browser.OpenAsync(External): drop visibility-filtered ResolveActivity pre-check by @Kebechet in #35652 <details> <summary>🔧 Fixes</summary> - [Browser.OpenAsync(External) on Android throws FeatureNotSupportedException for verified App Link owner URLs even with documented <queries> fix applied](#35651) </details> ## Essentials Texttospeech - [Mac, iOS, Windows] Fix for inconsistent Text-to-Speech rate behavior by @HarishwaranVijayakumar in #32850 <details> <summary>🔧 Fixes</summary> - [[Essentials] TTS rate](#32492) </details> ## Flyoutpage - [iOS/Mac] Fix FlyoutPage RTL FlowDirection is not working by @devanathan-vaithiyanathan in #34831 <details> <summary>🔧 Fixes</summary> - [[iOS/Mac] FlyoutPage RTL FlowDirection is not working properly](#34830) </details> - [Android] Fix for Android 16 Back button is not working after command from FlyoutPage by @BagavathiPerumal in #35196 <details> <summary>🔧 Fixes</summary> - [Android: BackButton on Android 16 not working after command from FlyOutPage](#33508) </details> ## Gestures - Fix DragGestureRecognizer.DropCompleted event not firing in Android platform by @KarthikRajaKalaimani in #35179 <details> <summary>🔧 Fixes</summary> - [[Android] DragGestureRecognizer.DropCompleted event not firing](#17554) </details> - Windows: Ensure layouts without background participate in hit testing by @jpd21122012 in #34364 <details> <summary>🔧 Fixes</summary> - [[Windows] TapGestureRecognizer does NOT work on a ContentView without Background](#32279) </details> - [iOS] Fix VoiceOver dropping child labels on layouts with SemanticProperties.Hint or TapGestureRecognizer by @Vignesh-SF3580 in #35590 <details> <summary>🔧 Fixes</summary> - [[iOS] VoiceOver does not correctly describe View with GestureRecognizers](#34380) </details> ## Hybridwebview - Fix RemovePossibleQueryString to also strip URL fragments by @kubaflo in #35551 <details> <summary>🔧 Fixes</summary> - [HybridWebViewQueryStringHelper.RemovePossibleQueryString removes '?' but not other special characters e.g. '#'](#31472) </details> - [Revert] - [Windows] Fix WebView blank rendering when used with HybridWebView by @SubhikshaSf4851 in #35814 ## Image - Avoid image source layout invalidation for fixed-size views by @AdamEssenmacher in #35369 <details> <summary>🔧 Fixes</summary> - [Image source swaps thrash layout under fixed constraints, tanking frame rate when scrolling virtualized collections](#32457) </details> - [Windows] Fix Image layout inconsistency caused by async decode race in GetDesiredSize by @praveenkumarkarunanithi in #34699 <details> <summary>🔧 Fixes</summary> - [[Windows] Image cropping produces inconsistent results when window is minimized or resized](#32393) </details> - [Testing] Include more testing around Windows Image Aspect recent fixes by @kubaflo in #35620 <details> <summary>🔧 Fixes</summary> - [[Testing] Include more testing around Windows Image Aspect recent fixes](#31686) </details> - Revert PR #30068 — Fix FontImageSource centering regression on Windows by @Shalini-Ashokan in #35642 <details> <summary>🔧 Fixes</summary> - [[Windows] Image with FontImageSource is not centered and gets clipped when WidthRequest/HeightRequest equals FontImageSource Size](#35618) </details> - [Android] Fix screenshot from WebView content not working by @kubaflo in #35384 <details> <summary>🔧 Fixes</summary> - [[Android] Loading the captured screenshot from webview content to Image control does not visible](#30010) </details> ## Label - Improve label mapping performance and ensure complete coverage including ToPlatform and subsequent property changes by @Tamilarasan-Paranthaman in #31159 - Fix for Label.FormattedText leaks labels when shared FormattedString is stored in Application.Resources by @BagavathiPerumal in #35582 <details> <summary>🔧 Fixes</summary> - [`Label.FormattedText` leaks labels when shared `FormattedString` is stored in `Application.Resources`](#35495) </details> - [iOS] Fix Label Span formatting test failures on candidate branch by @Vignesh-SF3580 in #35815 ## Layout - [iOS, Mac] Fix Item spacing not properly applied between items in Horizontal LinearItemsLayout by @Dhivya-SF4094 in #35445 <details> <summary>🔧 Fixes</summary> - [[CollectionView2] Item spacing not properly applied between items in Horizontal LinearItemsLayout](#35429) </details> - [Windows] Add Automation Id support for Layouts. by @SubhikshaSf4851 in #35562 <details> <summary>🔧 Fixes</summary> - [[Windows] AutomationId does not work for ContentView, Layouts and controls that inherit them](#4715) </details> - Avoid layout diagnostics allocations without listeners by @AdamEssenmacher in #35475 <details> <summary>🔧 Fixes</summary> - [MAUI 10 layout diagnostics no-consumer path is not zero-allocation](#35473) </details> - [Windows/Android] FlexLayout: Fix wrap misalignment due to floating-point precision by @SuthiYuvaraj in #31341 <details> <summary>🔧 Fixes</summary> - [FlexLayout Wrap Misalignment with Dynamically-Sized Buttons in .NET MAUI](#30957) </details> ## Listview - Fix Binding for ListView.IsRefreshing by @bill2004158 in #28516 <details> <summary>🔧 Fixes</summary> - [Bind ListView.IsRefreshing is not work.](#28514) </details> ## Map - Fix iOS/Catalyst MapPool retention with MapElements by @AdamEssenmacher in #35480 <details> <summary>🔧 Fixes</summary> - [iOS/Mac Catalyst MapHandler leaks MAUI Map views and MapElements through MapPool](#35479) </details> - Fix Android map view lifecycle cleanup by @AdamEssenmacher in #35476 <details> <summary>🔧 Fixes</summary> - [Navigating to a page with Maps multiple times Increase RAM Usage but doesn't reduce it back after navigating back](#15257) </details> - Fix Android map element options retention by @AdamEssenmacher in #35634 <details> <summary>🔧 Fixes</summary> - [[Regression] [Android] [Maps] Map locks up after rendering 50 Polylines](#20502) </details> ## Menubar - [MacCatalyst] Fix KeyboardAccelerator with Cmd+Shift modifiers breaks entire MenuBarItem on Mac Catalyst by @KarthikRajaKalaimani in #35318 <details> <summary>🔧 Fixes</summary> - [[Bug] KeyboardAccelerator with Cmd+Shift modifiers breaks entire MenuBarItem on Mac Catalyst](#35279) </details> ## Navigation - [iOS, Mac] Fix OnBackButtonPressed not invoked for NavigationPage and Shell by @Dhivya-SF4094 in #35072 <details> <summary>🔧 Fixes</summary> - [On Screen Back Button Does Not Fire OnBackButtonPressed in Android](#9095) - [ContentPage's OnBackButtonPressed not invoked on iOS and MacCatalyst](#8296) </details> - Fix Android stale ContainerView root leak by @AdamEssenmacher in #35372 <details> <summary>🔧 Fixes</summary> - [Android: Stale ContainerView retains replaced FlyoutPage graph](#35371) </details> - [Android] Fix for predictive back-to-home animation blocked by unconditional back callback registration by @BagavathiPerumal in #35223 <details> <summary>🔧 Fixes</summary> - [OnBackInvokedCallbacks block back-to-home animation](#34594) - [Migrate to OnBackPressedCallback](#24752) </details> - Revert [Android, iOS] - Flyout icon should remain visible when a page is pushed onto a NavigationPage or Shell page with the back button disabled. by @praveenkumarkarunanithi in #35604 ## Picker - [iOS] Fix Picker CharacterSpacing lost after item selection when Title is set by @SyedAbdulAzeemSF4852 in #34974 <details> <summary>🔧 Fixes</summary> - [[iOS] Picker loses CharacterSpacing after item selection when Title is set](#34971) </details> - [iOS] Fix Picker CharacterSpacing ignored on initial load by @SyedAbdulAzeemSF4852 in #34957 <details> <summary>🔧 Fixes</summary> - [[iOS] Picker ignores CharacterSpacing on initial load](#34955) </details> - [Windows] Fix for Picker CharacterSpacing Not Being Applied to Title and Dropdown Items by @SyedAbdulAzeemSF4852 in #30612 <details> <summary>🔧 Fixes</summary> - [[Windows] Picker CharacterSpacing property not applied to Title and PickerItems text](#30464) </details> - Fix Picker SelectedIndex deferred initialization by @AdamEssenmacher in #35629 <details> <summary>🔧 Fixes</summary> - [Picker Attribute "SelectedIndex" Not being respected on page load on Android?](#9150) </details> ## Progressbar - Fix iOS ProgressBar bounding box by @AdamEssenmacher in #35507 <details> <summary>🔧 Fixes</summary> - [[iOS] ProgressBar and Label don't correctly obey height and width at the core level](#7935) </details> ## RadioButton - [Windows, Android] Fix Border Color and Border Width Not applying for Radio Button by @HarishwaranVijayakumar in #35616 <details> <summary>🔧 Fixes</summary> - [[Windows, Android] Border Color and Border Width Not applying for Radio Button.](#35587) </details> - [inflight/current] Fixes a CS0111 build failure in RadioButton.cs caused by a duplicate OnPropertyChanged override by @HarishwaranVijayakumar in #35631 - Revert - Fix TalkBack not correctly narrating RadioButtons with Content by @devanathan-vaithiyanathan in #35625 <details> <summary>🔧 Fixes</summary> - [[Android] MissingMethodException AccessibilityNodeInfoCompat.set_Checked(bool) on 10.0.70 due to AndroidX.Core 1.17 breaking change](#35584) </details> ## Refreshview - [Windows] Fix RefreshView IsRefreshing property not working while binding by @devanathan-vaithiyanathan in #34845 <details> <summary>🔧 Fixes</summary> - [[Windows] RefreshView IsRefreshing property not working while binding](#30535) </details> - [Android] Fix for RefreshView triggering pull-to-refresh when scrolling inside a WebView with internal scrollable content by @BagavathiPerumal in #34614 <details> <summary>🔧 Fixes</summary> - [[Android] RefreshView triggers pull-to-refresh immediately when scrolling up inside a WebView](#33510) </details> ## SafeArea - [Android] Fix bottom safe area padding dropping to zero when keyboard is shown by @praveenkumarkarunanithi in #35084 <details> <summary>🔧 Fixes</summary> - [[Android] Bottom insets issues when keyboard is shown.](#32871) </details> - Gate SafeArea inset listeners in recycler items by @AdamEssenmacher in #35664 <details> <summary>🔧 Fixes</summary> - [[10.0.60] CollectionView scrolling performance regression](#35344) </details> ## ScrollView - [Windows] Fix COMException when restoring a ScrollView as ContentPage.Content after swapping it out by @Vignesh-SF3580 in #35360 <details> <summary>🔧 Fixes</summary> - [COMException when clone a page's content to a object and set it back later in mainthread on Windows](#35277) </details> - Fix - ScrollView.ScrollToAsync(x, y, animated) doesn't work when called from Page.OnAppearing by @Shalini-Ashokan in #35395 <details> <summary>🔧 Fixes</summary> - [[iOS] ScrollView.ScrollToAsync(x, y, animated) doesn't work when called from Page.OnAppearing](#31177) </details> ## Searchbar - [Android] Fix SearchBar IME full-screen extract mode in landscape orientation by @SubhikshaSf4851 in #35197 <details> <summary>🔧 Fixes</summary> - [[Android] Investigate SearchBar presentation in horizontal screen orientation ](#14708) </details> - [iOS 26] Fix SearchBar layout spacing issues for small HeightRequest values by @devanathan-vaithiyanathan in #35347 <details> <summary>🔧 Fixes</summary> - [Spacing problem with maui 10.0.60 iOS](#35286) </details> ## SearchBar - [Windows] Fix SearchHandler does not focus when ShowSoftInputAsync is called by @praveenkumarkarunanithi in #35079 <details> <summary>🔧 Fixes</summary> - [[Windows] SearchHandler.ShowSoftInputAsync() does not focus the SearchHandler](#34930) </details> ## Shell - Fix Android layout jump when navigating with IME open and NavBarIsVisible=false by @jpd21122012 in #34621 <details> <summary>🔧 Fixes</summary> - [Shell page without NavBar jumping when navigating with keyboard open](#34584) </details> - [Android] Add defensive not null check to SearchHandlerAppearanceTracker.FocusChange by @Transis-Felipe in #29939 - [Android] Fix for Shell colors change before navigation completes on Android in .NET 10 by @BagavathiPerumal in #35295 <details> <summary>🔧 Fixes</summary> - [Shell colors change before navigation completes on Android in .NET 10](#35060) </details> - [Windows] Fix Shell FlyoutItem not taking full width by @SubhikshaSf4851 in #35131 <details> <summary>🔧 Fixes</summary> - [MAUI WinUI Grids don't render properly in flyout menu](#19542) - [[Windows] [.NET 8 RC2] FlyoutItem Backgroundcolor Is not fully displaying](#18238) </details> - [Android, iOS, Catalyst] Fix SearchHandler.BackgroundColor cannot be reset to null by @HarishwaranVijayakumar in #35224 <details> <summary>🔧 Fixes</summary> - [[Android, iOS, Catalyst] SearchHandler.BackgroundColor cannot be reset to null](#35088) </details> - Fix for ApplyQueryAttributes being called on non-destination pages during back navigation by @BagavathiPerumal in #35392 <details> <summary>🔧 Fixes</summary> - [ApplyQueryAttributes gets called for not activated (navigated to) page on back](#35183) </details> - [Android] Fix Shell flyout background to follow Material 3 theme colors by @SyedAbdulAzeemSF4852 in #35148 <details> <summary>🔧 Fixes</summary> - [[Android] Shell Flyout ignores Material 3 surface color when UseMaterial3 is enabled](#35147) </details> - [Android] Fix Shell.FlyoutHeader background incorrect by @SyedAbdulAzeemSF4852 in #35489 <details> <summary>🔧 Fixes</summary> - [[Android] Shell.FlyoutHeader background is incorrect](#35416) </details> - [iOS/MacCatalyst] Fix Shell.BackgroundColor not applied to bottom TabBar by @Shalini-Ashokan in #35545 <details> <summary>🔧 Fixes</summary> - [[MacCatalyst] Shell.BackgroundColor not applied to bottom TabBar](#35380) - [[Catalyst] Shell.TabBarBackgroundColor is not applied](#35381) </details> - [Android] Fix Shell FlyoutIcon tint loss after navigation by @SyedAbdulAzeemSF4852 in #35561 <details> <summary>🔧 Fixes</summary> - [[Android] The flyout icon loses colours](#35390) </details> - [iOS] Fix Shell - opened keyboard on modal page shifts parent page/frame behind modal after update to 10.0.60 by @KarthikRajaKalaimani in #35559 <details> <summary>🔧 Fixes</summary> - [[iOS] Shell - opened keyboard on modal page shifts parent page/frame behind modal after update to 10.0.60](#35401) </details> - Fix intermediate pages not receiving query parameters in multi-page Shell navigation by @mattleibow in #35432 <details> <summary>🔧 Fixes</summary> - [Shell GoToAsync: no way to pass query parameters to intermediate pages in multi-segment navigation](#35107) </details> - [Windows] Fix Shell title bar overlap with window controls in RTL mode by @Shalini-Ashokan in #33109 <details> <summary>🔧 Fixes</summary> - [[Windows] Binding RTL FlowDirection in Shell causes Flyout MenuIcon and native window controls to overlap](#32476) </details> - [macOS] Fix IsEnabled property false not working on MenuBarItem by @devanathan-vaithiyanathan in #35546 <details> <summary>🔧 Fixes</summary> - [[macOS] IsEnabled property false not working on MenuBarItem](#34038) </details> - Fix Android Shell top inset when nav bar is hidden by @ne0rrmatrix in #35555 <details> <summary>🔧 Fixes</summary> - [wrong statusbar height when Android device has a notch](#35103) </details> - Fix Changing Content property of ShellContent doesn't change visual content by @devanathan-vaithiyanathan in #34630 <details> <summary>🔧 Fixes</summary> - [Changing Content property of ShellContent doesn't change visual content. ](#12669) </details> - Fixed a NullReferenceException when starting application with empty shell on Windows by @Shalini-Ashokan in #28879 <details> <summary>🔧 Fixes</summary> - [NullReferenceException when starting application with empty shell on Windows](#21562) - [Using SelectionChangedCommand with CollectionView in Shell.FlyoutContent results in Win32 Unhandled Exception](#10041) </details> ## Slider - [iOS] Slider: Scale ThumbImageSource to match default thumb size by @NirmalKumarYuvaraj in #34184 <details> <summary>🔧 Fixes</summary> - [[Slider] MAUI Slider thumb image is big on android](#13258) </details> ## Stepper - Fix iOS 26 Stepper overlap in landscape by @AdamEssenmacher in #35374 <details> <summary>🔧 Fixes</summary> - [[.NET10] D10-The number and buttons overlap after rotating the simulator.](#35211) </details> ## SwipeView - Fix SwipeViews with invoked properties crash the app in Release mode by @BagavathiPerumal in #35208 <details> <summary>🔧 Fixes</summary> - [[iOS/Catalyst] Swipeviews with invoked properties crash the app in Release](#18055) </details> - Fix SwipeItemView command leak by @AdamEssenmacher in #35510 <details> <summary>🔧 Fixes</summary> - [`SwipeItemView.Command` leaks row views and command parameters through `CanExecuteChanged`](#35498) </details> - [iOS/Android] Fix SwipeItem.IsVisible not refreshing native swipe items when binding changes by @SyedAbdulAzeemSF4852 in #35217 <details> <summary>🔧 Fixes</summary> - [SwipeItem.IsVisible doesn't properly refresh the native swipe items when the binding value changes dynamically](#34832) </details> - Fix SwipeView memory leak when SwipeItems are reused or replaced by @Vignesh-SF3580 in #35539 <details> <summary>🔧 Fixes</summary> - [SwipeView leaks when SwipeItems are reused or replaced](#35481) </details> - Fix SwipeItem IconImageSource color handling and rendering across platforms by @Shalini-Ashokan in #35632 <details> <summary>🔧 Fixes</summary> - [[Android] SwipeItem IconImageSource should allow more configuration](#23074) </details> ## Switch - [Android/Windows] Fix RadioButton gradient not clearing when switching background by @Shalini-Ashokan in #34997 <details> <summary>🔧 Fixes</summary> - [RadioButton Background does not reset when set to null at runtime](#34993) </details> - [Windows] Fix "PlatformView cannot be null here" exception during handler disconnect by @kubaflo in #35314 <details> <summary>🔧 Fixes</summary> - ["PlatformView cannot be null here" Exception in Switch control [Windows]](#27101) </details> - [iOS 26] Fix Switch ThumbColor and OffColor not applied on initial load by @SyedAbdulAzeemSF4852 in #35400 <details> <summary>🔧 Fixes</summary> - [iOS 26 Switch default color for Off and On is incorrect + Off Color is not applied at start + Thumb Colors is not applied](#35257) </details> - [Android] Fix AppBar flicker on CheckBox/Switch toggle with Material 3 by @Dhivya-SF4094 in #35181 <details> <summary>🔧 Fixes</summary> - [[Android] AppBar flicker while changing the CheckBox or Switch state after scrolling in Material 3](#35180) </details> - [Android] Fix Switch Shadow Does Not Follow Thumb when Toggle On or Off by @Dhivya-SF4094 in #35623 <details> <summary>🔧 Fixes</summary> - [[Android] Switch Shadow Does Not Follow Thumb when Toggle On or Off](#30046) </details> ## TabbedPage - [Android] Fix TabbedPage truncating tab titles instead of scrolling by @Shalini-Ashokan in #35086 <details> <summary>🔧 Fixes</summary> - [Maui migrating Xamarin to Maui - Tabbed Page Scroll Issue - Tabs are not scrolling](#16470) </details> - [Android] Fix BottomNavigationView remaining visible for TabbedPage inside modal NavigationPage after PushAsync by @Dhivya-SF4094 in #35359 <details> <summary>🔧 Fixes</summary> - [Android TabbedPage inside Modal Navigation does not overlay BottomNavigationView after PushAsync in .NET MAUI 10.0.60](#35331) </details> - [Android & iOS] TabbedPage leaks with shared GradientBrush. by @SubhikshaSf4851 in #35543 <details> <summary>🔧 Fixes</summary> - [TabbedPage leaks renderer/manager when BarBackground uses shared GradientBrush resource](#35469) </details> ## Templates - Bumps Syncfusion.Maui.Toolkit dependency to version 1.0.10 by @PaulAndersonS in #35608 ## Toolbar - Fix Android app bar inset background coloring by @ne0rrmatrix in #35601 <details> <summary>🔧 Fixes</summary> - [Android Edge-to-Edge: Shell and NavigationPage Top Bar colour is not used for status bar.](#35568) </details> ## Tooling - Add default .gitignore to MAUI project templates by @davidortinau in #34862 <details> <summary>🔧 Fixes</summary> - [Add a gitignore file to the Maui template in VS 2022](#4131) </details> - Fix: Propagate AdditionalProperties from ProjectReference in ResizetizeCollectItems by @mattleibow in #35575 <details> <summary>🔧 Fixes</summary> - [Resizetizer GetMauiItems does not propagate ProjectReference AdditionalProperties](#35574) </details> ## WebView - [Windows] Fix WebView blank rendering when used with HybridWebView by @SubhikshaSf4851 in #35092 <details> <summary>🔧 Fixes</summary> - [[Windows] WebView Regression from NET9 to NET10](#34558) </details> - Fix AOT integration test failures: suppress IL3050/IL2026 for HybridWebViewHandler in AddControlsHandlers by @mattleibow via @Copilot in #34868 - Fix Android activity result callback leak by @AdamEssenmacher in #35436 <details> <summary>🔧 Fixes</summary> - [Android WebView file chooser callbacks leak via ActivityResultCallbackRegistry](#35405) </details> - [Windows] Fix WebView Does Not Inherit App Theme by @devanathan-vaithiyanathan in #35037 <details> <summary>🔧 Fixes</summary> - [WebView on Windows Does Not Inherit App Theme](#34823) </details> - Fix for WebView leaks when reusing a shared WebViewSource by @BagavathiPerumal in #35524 <details> <summary>🔧 Fixes</summary> - [WebView leaks when reusing a shared WebViewSource](#35483) </details> - Destroy Android WebView on handler disconnect by @AdamEssenmacher in #35552 <details> <summary>🔧 Fixes</summary> - [Right way to dispose page with WebView](#18021) </details> ## Xaml - Fix: Enable VisualStateManager to set Style property dynamically by @Shalini-Ashokan in #33389 <details> <summary>🔧 Fixes</summary> - [Setting the `Style` property using the `VisualStateManager` within a Style resource does not work](#17175) </details> - Fix Implicit parameter conversion from integer to byte fails with source generated XAML by @KarthikRajaKalaimani in #35444 <details> <summary>🔧 Fixes</summary> - [Implicit parameter conversion from integer to byte fails with source generated XAML](#35396) </details> <details> <summary>🔧 Infrastructure (3)</summary> - Fix: Build fails when appicon is an empty (but valid) SVG by @Shalini-Ashokan in #35305 <details> <summary>🔧 Fixes</summary> - [Build fails when appicon is an empty (but valid) svg after upgrade to 10.0.60](#35293) </details> - [inflight/current] Fix CS0111 duplicate GetNativeCharacterSpacing in PickerHandlerTests.iOS by @SyedAbdulAzeemSF4852 in #35419 - Update WinAppSDK to 1.8.260508005 by @kubaflo in #35678 </details> <details> <summary>🧪 Testing (3)</summary> - Backport Test Fixes and Snapshots from SR to Inflight Branch by @Tamilarasan-Paranthaman in #35499 - Fix hardcoded version of Microsoft.DotNet.XHarness.TestRunners.Xunit in test projects by @akoeplinger in #29905 - [Testing] Fixed Build error on inflight/ candidate PR 35716 by @HarishKumarSF4517 in #35730 </details> <details> <summary>🏠 Housekeeping (1)</summary> - [HouseKeeping] Fix inconsistant namespace in HostApp by @NirmalKumarYuvaraj in #35210 </details> <details> <summary>📦 Other (8)</summary> - Add .cab and ReconnectModal.razor.js to signing config by @jesuszarate in #35026 - Fix typo in Clipboard.shared.cs by @Deadpikle in #35316 - Fix single modifier for NSMenuItem accelerators by @jeremy-visionaid in #35351 - Avoid unnecessary LINQ enumerations by @jeremy-visionaid in #35272 - [Testing] Replace retryDelay with retryTimeout in UI tests by @kubaflo in #35367 - Replace JavaFinalize() with Dispose(bool) in GenericAnimatorListener by @jonathanpeppers in #35548 - Fix incorrect SDK provisioning commands in integration-tests instructions by @davidnguyen-tech in #34992 - Fix VisualElement.ChangeVisualState() gets stuck in Selected state by @Dhivya-SF4094 in #35421 <details> <summary>🔧 Fixes</summary> - [VisualElement's ChangeVisualState gets stuck in Selected state](#35399) </details> </details> <details> <summary>📝 Issue References</summary> Fixes #4131, Fixes #4715, Fixes #5947, Fixes #7150, Fixes #7814, Fixes #7935, Fixes #8296, Fixes #9095, Fixes #9150, Fixes #10041, Fixes #12669, Fixes #13258, Fixes #14708, Fixes #15257, Fixes #16470, Fixes #17175, Fixes #17554, Fixes #17698, Fixes #18021, Fixes #18055, Fixes #18238, Fixes #19542, Fixes #19668, Fixes #20502, Fixes #20615, Fixes #21562, Fixes #22053, Fixes #23074, Fixes #24752, Fixes #27101, Fixes #27627, Fixes #27770, Fixes #27922, Fixes #28514, Fixes #28676, Fixes #28891, Fixes #29411, Fixes #29449, Fixes #30010, Fixes #30046, Fixes #30404, Fixes #30464, Fixes #30535, Fixes #30957, Fixes #31048, Fixes #31177, Fixes #31472, Fixes #31686, Fixes #32279, Fixes #32393, Fixes #32404, Fixes #32457, Fixes #32476, Fixes #32492, Fixes #32731, Fixes #32871, Fixes #33508, Fixes #33510, Fixes #33780, Fixes #34038, Fixes #34104, Fixes #34257, Fixes #34380, Fixes #34522, Fixes #34558, Fixes #34584, Fixes #34594, Fixes #34823, Fixes #34830, Fixes #34832, Fixes #34899, Fixes #34930, Fixes #34955, Fixes #34971, Fixes #34973, Fixes #34993, Fixes #35060, Fixes #35076, Fixes #35088, Fixes #35103, Fixes #35107, Fixes #35113, Fixes #35114, Fixes #35147, Fixes #35180, Fixes #35183, Fixes #35211, Fixes #35214, Fixes #35244, Fixes #35257, Fixes #35277, Fixes #35279, Fixes #35280, Fixes #35286, Fixes #35293, Fixes #35313, Fixes #35326, Fixes #35331, Fixes #35344, Fixes #35354, Fixes #35371, Fixes #35380, Fixes #35381, Fixes #35387, Fixes #35390, Fixes #35396, Fixes #35397, Fixes #35399, Fixes #35401, Fixes #35405, Fixes #35416, Fixes #35429, Fixes #35469, Fixes #35472, Fixes #35473, Fixes #35479, Fixes #35481, Fixes #35483, Fixes #35485, Fixes #35492, Fixes #35495, Fixes #35497, Fixes #35498, Fixes #35513, Fixes #35517, Fixes #35568, Fixes #35573, Fixes #35574, Fixes #35584, Fixes #35587, Fixes #35615, Fixes #35618, Fixes #35651, Fixes #35654 </details> **Full Changelog**: main...inflight/candidate
Note
Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment whether this change resolves your issue. Thank you!
This pull request addresses a regression where calling
ScrollTo(0)on a groupedCollectionViewdid not work as expected on Android. The changes add a fix to theMauiRecyclerViewhandler to properly handle this case, and introduce both a sample test page and a UI test to verifyRegression cause: PR #31553 fixed an
ArgumentOutOfRangeExceptionfor invalid group indices by adding a null-safety bounds check inFindBoundItemInGroup. However, it inadvertently removed thegroupIndex < 0fallback that handled the valid case ofScrollTo(index)with no group specified. As a result,GetGroupItemsViewSource(-1)returnsnull, causingDetermineTargetPositionto returnInvalidPosition (-1)andthe scroll to silently abort
Description of Change
Bug fix for grouped CollectionView scroll:
DetermineTargetPositioninMauiRecyclerView.csto correctly handleScrollTo(index)when no group index is specified, ensuring flat index lookup works for groupedCollectionView.New test coverage:
Issue35313.csthat demonstrates and allows manual testing ofScrollTobehavior on groupedCollectionView.TestCases.Shared.Tests/Tests/Issues/Issue35313.csto automatically verify thatScrollTo(0)scrolls to the start of a groupedCollectionViewon Android.Issues Fixed
Fixes #35313
Tested the behavior in the following platforms
BeforeFix35313.mov
AfterFix35313.mov