MPMoviePlayer crashing on getting out and in the app

I get this error:

-[MPInlineVideoFullscreenViewController player]: unrecognized selector sent to instance 0x15e63fe90
 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MPInlineVideoFullscreenViewController player]: unrecognized selector sent to instance 0x15e63fe90'

Using iOS 8, the language is Objective-C. But I have this same code in the if statement like this in applicationDidBecomeActive and it does not crash:

UIViewController *vc = ((UINavigationController*)self.window.rootViewController).visibleViewController;
    if([vc isKindOfClass:[VideoViewController class]]) {
            VideoViewController *vca = vc;
        if(vca.player.playbackState == MPMoviePlaybackStatePaused){
            [vca.player play];
        }

But if I use it on the different MPMoviePlayer, and it is fullscreen. I switch to a different app, and back, it crashes. Buy why not with the other movie controller. Also, the other one does not show any playback controls, while this one which crashes does.