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VideoPlayback is stuck when back from Fullscreen

By every365 on Thu, 04/09/2015 - 09:25
Hello. I am testing the original VideoPlayback sample of Vuforia 4.0.103 on iPhone5(iOS 8.1.3). I played a video many times with changing views between the AR camera view and the fullscreen native player.When I tap the done button on the fullscreen mode and the AR camera view shows up again, the AR camera view is sometimes stuck. I get the troble repeatedly.  The app itself is not stuck because the slide menu is working properly by double-tapping. I remember that previous sample apps don't have the problem. I guess it is the bug of the version 4.0 sample app. I will develop my app based on the VideoPlayback sample soon. I'd like to fix the problem. Could you give me advices?

I tried debugging the sample.
 
After the camera background stops, I control(play and stop) a video on the texture. 
 
Logs show renderFrame is working right and I can hear the sound of the video.
 
So, the problem

I found what causes the problem.
 
I updated my iPhone6 Plus to 8.3, the problem does't occur after that.
 
Apparently, the iOS 8.1.x and 8.2.x bugs cause the problem and the problem was fixed now.