Native AOT: InvalidCastException in CommunityToolkit when using GridSplitter

[tipa]

Description

This bug/crash has been reported previously here: CommunityToolkit/Windows#612

System.InvalidCastException: Specified cast is not valid
   at System.Runtime.RuntimeExports.RhUnbox2(MethodTable*, Object) + 0x3f
   at CommunityToolkit.WinUI.Controls.GridSplitter.IsStarColumn(ColumnDefinition) + 0x53
   at CommunityToolkit.WinUI.Controls.GridSplitter.OnDragHorizontal(Double) + 0xf9
   at CommunityToolkit.WinUI.Controls.SizerBase.OnManipulationDelta(ManipulationDeltaRoutedEventArgs) + 0x11b
   at ABI.Microsoft.UI.Xaml.Controls.IControlOverrides.Do_Abi_OnManipulationDelta_15(IntPtr, IntPtr) + 0x58

Steps To Reproduce

See example project: Crash.zip
To reproduce the crash, grab the GridSplitter handle and try to move it -> app crashes

Important: Run in Native Aot (not CoreCLR) - so I had to publish the app, then install and run it

Expected Behavior

No crash

Version Info

CsWinRT 2.2

Additional Context

No response