PointerRoutedEventArgs.GetCurrentPoint() gives a frozen state of the PointerPoint after PointerExited fired

[WelterDevelopment]

Describe the bug

I am using the PointerExited event of my own text editor control to trigger scrolling (e.g. as in VS, the text scrolls up with a speed depending on the distance of the Pointer to the TextControl). After the scrolling is triggered, a DispatcherTimer should be used to continously get the current state of the Pointer to slow down/ stop the scrolling. But within the DispatcherTimer.Tick event action, calling GetCurrentPoint() only gives the same PointerPoint as in the initial PointerExited event. This worked in WinAppSDK 1.0.X but does not work in 1.1.X anymore. Is this by design? If yes, how can I achieve the wanted behaviour?

Steps to reproduce the bug

1. Open fresh WinAppSDK 1.1.4 C# App; Add a dummy control to xaml:

<Grid x:Name="TextControl" Background="Red" Height="300" Width="300" PointerExited="Grid_PointerExited"></Grid>

2. Add the event that starts the DispatcherTimer:

private void Grid_PointerExited(object sender, PointerRoutedEventArgs e)
{
  PointerPoint point = e.GetCurrentPoint(TextControl);
  if (point.Properties.IsLeftButtonPressed)
  {
    if (point.Position.Y < 0)
    {
      DispatcherTimer Timer = new DispatcherTimer() { Interval = TimeSpan.FromMilliseconds(1000) };
      Timer.Tick += async (a, b) =>
      {
        PointerPoint pointup = e.GetCurrentPoint(TextControl);
        
        Debug.WriteLine($"Scrolling up with the current Point: {pointup.Position} with LeftButtonPressed state: {pointup.Properties.IsLeftButtonPressed}");
        
        if (pointup.Position.Y > 0 | !pointup.Properties.IsLeftButtonPressed)
        {
          ((DispatcherTimer)a).Stop();
          Debug.WriteLine("Scrolling stopped! But sadly, this code is never reached, since pointup seems to be frozen");
        }
        
        // Do the Scrolling and update the selected text
        // VerticalScroll.Value += pointup.Position.Y;
        // Selection = new(Selection.Start, await PointToPlace(pointup.Position));
      };
      Timer.Start();
    }
  }
}

3. Run the App, click and hold inside the red Grid, move the cursor upwards to exit the control and to start the DispatcherTimer
4. Watch the Debug console, move the cursor around, release the left button

Output (even when you move the cursor and release the left button) is always the same:

Scrolling up with the current Point: 172,00003;-0,80000305 with LeftButtonPressed state: True
Scrolling up with the current Point: 172,00003;-0,80000305 with LeftButtonPressed state: True
Scrolling up with the current Point: 172,00003;-0,80000305 with LeftButtonPressed state: True

Expected behavior

pointup.Position should always be the current pointer position and not the 'frozen' pointer position of the PointerExited event. The same problem is with all properties, like pointup.Properties.IsLeftButtonPressed.

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.1.4

Windows app type

• UWP
• Win32

Device form factor

Desktop

Windows version

Windows 11 (21H2): Build 22000

Additional context

No response

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