Commented Issue: Black screen then cancel during OnNavigate when page transition is set [11243]

I have silverlight for wp toolkit version 4.2012.6.25 installed
1. I set my root frame to TransitionFrame and set page transition on my PhoneApplicationPage via xaml(it doesn't matter what kind):




















2. I define my handler for RootFrame.Navigating event and want cancel navigation in it in some cases by setting NavigatingCancelEventArgs.Cancel to true.
3. Then I set NavigatingCancelEventArgs.Cancel to true in my RootFrame.Navigating event handler when user go from page that was described in 1. As a result I'm getting clear black screen(dark theme) with application bar only.

I saw the sources and think that this happens because in the TransitionFrame the Navigating handler is defined too. But I very need to cancel navigating in some cases in my handler and I want to see the whole page which a user tried to navigate from.
Comments: ** Comment from web user: shawnoster **

Can you attach a very simple repro project to the bug? I've tried it and I'm unable to repro the issue but I may be doing something different.

Also there have been some fixes recently in this area so you may want to download the latest source and compile it to see if that addresses the issue you're seeing.

Thanks