Problems with event bubbeling (ScrollViewer)

Question

I have a problem with bubbeling events. I manage to bubble events in borders, grid, stackpanel, but not in a ScrollViewer

If you look at the example below you will notice that when you click the TextBlock the event is bubbeled up to the Grid. But when I include the ScrollViewer the event stops here and is not sent up to the Grid.

Does anyone now whay this happends and if it can be fixed? I really need to be able to bubble events through a ScrollViewer as I use it all the time.

<Grid MouseLeftButtonDown="Grid_MouseLeftButtonDown">
        <!--<ScrollViewer MouseLeftButtonDown="ScrollViewer_MouseLeftButtonDown">-->
            <StackPanel Orientation="Vertical" MouseLeftButtonDown="StackPanel_MouseLeftButtonDown">
                <TextBlock Text="Click me to bubble an event" MouseLeftButtonDown="TextBlock_MouseLeftButtonDown"/>
            </StackPanel>
        <!--</ScrollViewer>-->
</Grid>

public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); }

    private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        MessageBox.Show("LayoutRoot clicked");
    }


    private void ScrollViewer_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        MessageBox.Show("ScrollViewer clicked");
        e.Handled = false;
    }

    private void StackPanel_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        MessageBox.Show("StackPanel clicked");
        e.Handled = false;
    }

    private void TextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        MessageBox.Show("Textblock clicked");
        e.Handled = false;
    }
}