ReunionCaptionControlsWindow ButtonHoverBackgroundColor does not dismiss when there is another window in front of it

[HO-COOH]

Describe the bug

Normal win32 window caption button / uwp window does not have this issue.

Steps to reproduce the bug

1. Open two winui 3 gallery
2. Place one in front of another, align the right edge, but stack them with a space that's less than the title bar height
3. Make the front window active
4. Move your mouse from the back window's caption button (so it goes into hover state), to the front window. Notice the button in the back window does not go back to normal state.

Expected behavior

No response

Screenshots

NuGet package version

WinUI 3 - Windows App SDK 1.6.5: 1.6.250205002

Windows version

Windows 11 (24H2): Build 26100

Additional context

No response

[marcelwgn]

This seems to be happening when setting ExtendsContentIntoTitlebar to true, even if there is no other content in the window. Its also not necessary to have two windows of the same app, any second window will do for this effect to occur.