Show DisplayAlert from background thread.

DisplayAlert

private void Button_Clicked(object sender, EventArgs e)
{
    Task.Run(() => OnShowAlert("Hello"));
}

private void OnShowAlert(string text)
{
    string title = $"OnShowAlert tid={Environment.CurrentManagedThreadId}";
    Device.BeginInvokeOnMainThread(
        async () => await DisplayAlert(title, text, "OK"));
}

This code works properly in release and debug builds. If you remove the BeginInvokeOnMainThread it dies a horrible death.