Describe the bug

When you select the Acrylic Material in Settings, leave the page and go back to it, it shows Acrylic Thin as selected even though it is not.

Steps to reproduce the bug

1. Open the App
2. Go to Settings (Appearance & Behavior)
3. Change the Material to Acrylic
4. Leave the Page
5. Go back to Settings (Appearance & Behavior)
6. Notice how Acrylic Thin is selected even though it is not active

Expected behavior

It should save it correctly so that Acrylic will be selected when you go to the Settings.

Screenshots

No response

NuGet package version

DevWinUI 9.4.2

IDE

Visual Studio 2026-Insider

Additional context

No response