Visual defect in VirtualizingStackPanel in FlipView WP 8.1

Question

In my project i am working with FlipView with collection of images. For better performance i am using VirtualizingStackPanel and it working fine, but i noticed strange behavior of last item of collection in flipview. If i am scrolling to last item and then scroll back to the previous, last image sometimes disappearing for a moment as though redrawing(flickering). Here is modified flipview sample from msdn: http://1drv.ms/1d2WGzg . You can try it yourself on first page Scenario1_Population.

Code what i have add to this sample:

<FlipView.ItemsPanel>
    <ItemsPanelTemplate>
         <VirtualizingStackPanel Orientation="Horizontal"/>
    </ItemsPanelTemplate>
</FlipView.ItemsPanel>

Has anyone faced this problem before? I will be appreciate for any advice!