Commented Issue: WP7 page transition error when resuming app [9465]

It looks like using the below combination of transition, caused some glitches to the pages, when u switch to the application, using the Mango multi tasking. Can easily be recreated in the sample that is provided with the toolkit.

(the one below, gives a turnstil effect that is not completed, as shown in 1.png)
<toolkit:TransitionService.NavigationInTransition>
<toolkit:NavigationInTransition>
<toolkit:NavigationInTransition.Backward>
<toolkit:TurnstileTransition Mode="BackwardIn"/>
</toolkit:NavigationInTransition.Backward>
<toolkit:NavigationInTransition.Forward>
<toolkit:SlideTransition Mode="SlideUpFadeIn"/>
</toolkit:NavigationInTransition.Forward>
</toolkit:NavigationInTransition>
</toolkit:TransitionService.NavigationInTransition>
<toolkit:TransitionService.NavigationOutTransition>
<toolkit:NavigationOutTransition>
<toolkit:NavigationOutTransition.Backward>
<toolkit:SlideTransition Mode="SlideDownFadeOut"/>
</toolkit:NavigationOutTransition.Backward>
<toolkit:NavigationOutTransition.Forward>
<toolkit:TurnstileTransition Mode="ForwardOut"/>
</toolkit:NavigationOutTransition.Forward>
</toolkit:NavigationOutTransition>
</toolkit:TransitionService.NavigationOutTransition>


(the one below, gives a slid up effect that is not completed, as shown in 2.png)
<toolkit:TransitionService.NavigationInTransition>
<toolkit:NavigationInTransition>
<toolkit:NavigationInTransition.Backward>
<toolkit:SlideTransition Mode="SlideUpFadeIn"/>
</toolkit:NavigationInTransition.Backward>
<toolkit:NavigationInTransition.Forward>
<toolkit:TurnstileTransition Mode="ForwardIn"/>
</toolkit:NavigationInTransition.Forward>
</toolkit:NavigationInTransition>
</toolkit:TransitionService.NavigationInTransition>
<toolkit:TransitionService.NavigationOutTransition>
<toolkit:NavigationOutTransition>
<toolkit:NavigationOutTransition.Backward>
<toolkit:TurnstileTransition Mode="BackwardOut"/>
</toolkit:NavigationOutTransition.Backward>
<toolkit:NavigationOutTransition.Forward>
<toolkit:SlideTransition Mode="SlideDownFadeOut"/>
</toolkit:NavigationOutTransition.Forward>
</toolkit:NavigationOutTransition>
</toolkit:TransitionService.NavigationOutTransition>
Comments: ** Comment from web user: FourSpotProject **

I think I have to adjust my comment somehow: what I wrote is only partly right.
The real problem is that when leaving the app, the transition is started but never completes (because of the app going into dormant state). And when one navigates back then, the wrong transition is executed (the backward-out one instead of backward-in), which leads to different types of transitions being executed.
I've eventually fixed this bug by adding

if (e.Uri.OriginalString == "app://external/") return;

after

FlipPresenters();

in TransitionFrame.cs.

Hope this helps.