Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

There is a NullReferenceException that is thrown when an attempt to show a popup occurs as a result of an event firing in the background when the MAUI application has no focus.

Expected Behavior

I would assume the pop-up should show up normally.
Or having read a little more on how pop-ups follow the flyout behavior and close when the app loses focus, I would very least
that there are no exceptions thrown and that an internal handling or perhaps an immediate closure of the pop-up takes place.
(maybe the developer can obtain the result just like normally detecting if there was a tap outside to dismiss...etc)

Steps To Reproduce

1- Download the CommunityToolkit.Maui from github
2- Modify the MultiplePopupPage.xaml.cs file to add a timer to the constructor as follows:

public MultiplePopupPage(IDeviceInfo deviceInfo,
								PopupSizeConstants popupSizeConstants,
								MultiplePopupViewModel multiplePopupViewModel,
								CsharpBindingPopupViewModel csharpBindingPopupViewModel)
		: base(multiplePopupViewModel)
	{
		InitializeComponent();

		this.popupSizeConstants = popupSizeConstants;
		this.csharpBindingPopupViewModel = csharpBindingPopupViewModel;

//Simulate a call back automatically showing a pop up in 5 seconds.
//Try it with the app in focus and while having lost focus.
		Timer x = new Timer(
			new TimerCallback((s) =>
			{
				Shell.Current.Dispatcher.Dispatch(() => HandleButtonPopupButtonClicked(new object(), new EventArgs()));				
			}), 
			null, 5000, Timeout.Infinite);
	}

3- Run CommunityToolkist.Maui.Sample application in DEBUG mode.
4- Navigate to Views->MultiplePopupPage
5- Immediately switch app focus to a Notepad or any other window.

Link to public reproduction project repository

https://github.com/fkahhaleh/MauiToolkit_Bug_Reproduction.git

Environment

- .NET MAUI CommunityToolkit: v 3.0.0
- OS: Windows 11
- .NET MAUI: 7.0.49 (MAUI Graphics and 2DGraphics)

Anything else?

The error is thrown in MauiPopup.Window.cs @ line:109
VirtualView is actually a proper instance up until line 107, where ShowAttachedFlyout(...) executes and as soon as it returns
VirtualView is null at that point!