Reorder items in a ListView in a SettingsFlyout causes items to hide behind the SettingsFlyout

Question

I have a SettingsFlyout with a ListView with TextBlocks and when I try to reorder a TextBlock, the TextBlock dissapears behind the SettingsFlyout. When I move the TextBlock to the left, the TextBlock appears as soon as it moves from under the SettingsFlyOut.

I tried to give the TextBlocks a higher z-index, but that doesn't solve the problem.

Is this a bug? And can it be solved with a workaround?

Edit:

I found a workaround:

In the listview event DragItemStarting I make a grid with a white background on the underlying page visible and set the SettingsFlyout background transparent.

In the SettingsFlyout event 'LostFocus' I hide the white grid in the background and set the SettingsFlyout background back to white.

private void lstvwOrder_DragItemsStarting(object sender, DragItemsStartingEventArgs e)
		{
			Frame RootFRame = Window.Current.Content as Frame;
			Page PageRoot = RootFRame.Content as Page;
			Grid GridMain = PageRoot.FindName("GridMain") as Grid;
			Grid grdSettingsBackground = PageRoot.FindName("grdSettingsBackground") as Grid;
			grdSettingsBackground.Visibility = Visibility.Visible;
			flyoutPreferences.Background = new SolidColorBrush(Colors.Transparent);
		}

private void flyoutPreferences_LostFocus(object sender, RoutedEventArgs e)
		{
			Frame RootFRame = Window.Current.Content as Frame;
			Page PageRoot = RootFRame.Content as Page;
			Grid GridMain = PageRoot.FindName("GridMain") as Grid;
			Grid grdSettingsBackground = PageRoot.FindName("grdSettingsBackground") as Grid;
			flyoutPreferences.Background = new SolidColorBrush(Colors.White);
			grdSettingsBackground.Visibility = Visibility.Collapsed;
		} 

The 'GridMain' is the first grid on every page and 'grdSettingsFlyout' is the grid with the same dimensions as the SettingsFlyout and with a white background color.