DisplayAlert/ActionSheet Fails on Windows, Android, and Mac

[LogishaSelvarajSF4525]

Description

The alerts (DisplayAlert) or action sheets (DisplayActionSheet) do not appear when invoked, even when the calls are wrapped within BeginInvokeOnMainThread in the constructor.
No errors or exceptions are logged in the output, leaving developers without diagnostic information.
This issue was identified during the investigation of Bugzilla45743.
The problem occurs while transitioning from Xamarin.UITest to Appium for UI testing.

In iOS platform:

In other platforms:

Steps to Reproduce

1. Run the application on a windows platform. DisplayAlertSample.zip
2. While run the sample it shows the DisplayAlert/ActionSheet.
3. Observe that DisplayAlert/ActionSheet was not shown.

Expected Behaviour:
DisplayAlert/ActionSheet should display the pop message.

Actual Behaviour:

DisplayAlert/ActionSheet message are not displayed on Windows, Android and Mac.

Link to public reproduction project repository

No response

Version with bug

9.0.12 SR1.2

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

No response

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[ninachen03]

This issue has been verified using Visual Studio 17.13.0 Preview 1.0 (9.0.12 & 8.0.3). Can repro it with user's project.

[FIDS]

I'm having the same issue within our Android and iOS products that contain an embedded Maui map control. Worked fine when the product was Xamarin based but not since moving to Maui. My environment is Maui .Net 9.0.21, CommunityToolkit.Mvvm 8.4 and VS 17.12.3. This is a roadblock stopping the release of our converted (Xamarin to Maui) mobile application.