Window.ShowDialog(owner) with minimized owner is not locking the owner correctly

[ppaszkiewiczcom]

Describe the bug

When using dialog.Show(owner) on owner with WindowState.Minimized the dialog will appear, however owner can be restored through task bar click (not through alt-tab) and interacted with freely which is unexpected.

To Reproduce

Create and dialog.Show(owner) on owner in minimized state - in my use case it manifested when trying to implement an "unsaved changes" warning (something like this):

    protected override void OnClosing(WindowClosingEventArgs e)
    {
        base.OnClosing(e);
        if (ViewModel.HasUnsavedChanges)
        {
            e.Cancel = true;
            Dispatcher.UIThread.Post(async () =>
            {
                var dialog = new UnsavedChangesDialog();
                await dialog.ShowDialog(this);
                if (dialog.Result == ...)
                {
                    // ...
                }
            });
        }
    }

With this code I minimize the main window and attempt to close it through task bar or by turning off the system to open the dialog.

While dialog is shown owner can be restored with taskbar click and freely used, disregarding the dialog.

Expected behavior

Owner window should remain locked as long as any OwnedWindows exist, regardless of when they appeared.

My current workaround is to force owner back into normal/fullsrceen state (that I have to keep track of) before any dialog is shown.

Avalonia version

11.2.4

OS

Windows

Additional context

System: Windows 10, 19045.5371
Theme: Fluent theme