Bug: InvalidOperationException when closing a child window (UWP .NET 9)

[kinex]

Description

When I open a new child window in UWP (.NET 9) and try to close it using Window.Current.Close(), the following exception is thrown:

System.InvalidOperationException
  HResult=0x80131509
  Message=Cannot release objects that are not runtime wrappers of native WinRT objects.
  Source=WinRT.Runtime
  StackTrace:
   at WinRT.DefaultComWrappers.ReleaseObjects(IEnumerable objects) in WinRT\DefaultComWrappers.cs:line 145

This works without issues in UWP .Net Native.

However, closing the child window with ApplicationView.GetForCurrentView().TryConsolidateAsync() seems to work better. That said, it still crashes in my production app if I place a breakpoint on that line, but works fine without the breakpoint. Interestingly, I could not reproduce this issue in the provided sample app.

I also observed that the crash occurs when building for Debug/x64, but it works correctly when building for Debug/x86.

Steps To Reproduce

1. Open a new child window

        async void OpenChildWindowButton_Click(object sender, RoutedEventArgs e)
        {
            CoreApplicationView newView = CoreApplication.CreateNewView();
            int newViewId = 0;
            await newView.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
            {
                Frame frame = new Frame();
                frame.Navigate(typeof(ChildPage), null);
                Window.Current.Content = frame;
                Window.Current.Activate();
                newViewId = ApplicationView.GetForCurrentView().Id;
            });

            bool viewShown = await ApplicationViewSwitcher.TryShowAsStandaloneAsync(newViewId);
        }

2. Close the child window

        async void CloseChildWindowButton_Click(object sender, RoutedEventArgs e)
        {
            // crash
            Window.Current.Close();
            
            // no crash
            //await ApplicationView.GetForCurrentView().TryConsolidateAsync();
        }

When testing make sure the build target Debug/x64 is selected.

Expected Behavior

No crash.

Version Info

VS 17.13.4

Additional Context

Sample app to reproduce the issue.

App1.zip

[Sergio0694]

I can repro locally, will investigate. Thank you so much for including such a minimal repro and all the info! 🙂