Those animation issues pop up often, and you can get around them by using DispatchQueue.main.asyncAfter(.now() + 0.1) but often you can figure out what the actual issue is (i.e., you're likely attempting to present something in the wrong place) and you should do that instead.
That's a horrible fix, introduces jank, and doesn't work cross device.
You normally want a CoreAnimation completion block ([CATransaction setCompletionBlock:^(){}], with an enclosing [CATransaction begin] and [CATransaction end].
