Describe the bug

Using scaled visual assets in the package.appxmanifest results in the following error when trying to create a bundled app package -

The "WinAppSdkSignAppxPackageBundle" task was not found. Check the following: 1.) The name of the task in the project file is the same as the name of the task class. 2.) The task class is "public" and implements the Microsoft.Build.Framework.ITask interface. 3.) The task is correctly declared with in the project file, or in the *.tasks files located in the "C:\Program Files\Microsoft Visual Studio\18\Insiders\MSBuild\Current\Bin\amd64" directory.

This is for Winui Blank App Packaged.
The exact same images worked perfectly in 1.7.

Steps to reproduce the bug

1. Create new Winui Blank App Packaged with 1.8
2. Create bundled package - no problem.
3. Add scaled visual asset to manifest eg. SmallTile.scale-100.png.
4. Create bundled package - Computer says no! Error MSB4036.
5. Remove any scaled visuals and packages are again created no problem.

Expected behavior

No response

Screenshots

No response

NuGet package version

Windows App SDK 1.8.0: 1.8.250907003

Packaging type

Packaged (MSIX)

Windows version

Insider Build (xxxxx)

IDE

Other

Additional context

Windows Version 25H2
IDE VS 2026 Insider