CATransition animation causes screen to black out

Use the CATransition animation to let the user scroll through the pages of a tutorial.

Now in iPadOS 13.6 beta 2 this causes screen to black out for a second before the next page is shown.

Does not happen with kCATransitionFade but will all other animation types.

I use the kCATransitionPush with subtypes kCATransitionFromRight and kCATransitionFromLeft.

Code:

CATransition *animation = [CATransition animation];
 [animation setDuration:0.4];
 [animation setType:kCATransitionPush];
 [animation setSubtype:kCATransitionFromRight];
 [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
 [[slidingView layer] addAnimation:animation forKey:nil];