Which version of the app?

WinUI 3 Gallery

Description

Steps to reproduce the exception:

1. Run the app on Debug mode.
2. Go to the Multiple windows page.
3. Click the Create new Window button and create a child window.
4. Close the app (the parent window).
5. You'll get the following exception. (See the screenshot below.)

   Exception thrown at 0x00007FF93701933A in WinUIGallery.exe: Microsoft C++ exception: winrt::hresult_error at memory location 0x00000053943ADDA0.
   

Creating a child window by clicking the Click here to launch the sample button on the TabView page also throws the exception.

Screenshots

Windows version

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Additional context

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