maui: WinUI: Pushing the same page instance onto a NavigationPage after popping it causes a crash.

Description

UWP only: Push a ContentPage onto a NavigationPage. Pop the page, using the back button. Push the same page again. Exception = {“Catastrophic failure (0x8000FFFF (E_UNEXPECTED))”}

Minimal repro: https://github.com/Keflon/MauiNavigationBugRepro

Steps to Reproduce

1. Create a MAUI app.
2. Make this change in App.xaml.cs:

public App()
{
    InitializeComponent();
    //MainPage = new AppShell();
    MainPage = new NavigationPage(new MainPage());
}

In MainPage.xaml.cs add the following, where _childPage is set to an instance of a Maui Page

private void OnNavigateClicked(object sender, EventArgs e)
{
    App.Current.MainPage.Navigation.PushAsync(_childPage);
}

1. Add a Button in MainPage.xaml that raises the click handler.

<Button 
    x:Name="NavigateBtn"
    Text="UWP Navigate Bug"
    SemanticProperties.Hint="Demonstrates a UWP navigation bug"
    Clicked="OnNavigateClicked"
    HorizontalOptions="Center" />

1. Click the Button.
2. Press the back button.
3. Click the button.
4. Notice UWP crashes with Exception = {“Catastrophic failure (0x8000FFFF (E_UNEXPECTED))”}

Version with bug

6.0 (current)

Last version that worked well

Release Candidate 3 (current)

Affected platforms

Windows

Affected platform versions

Latest

Did you find any workaround?

No

Relevant log output

No response