There's an delay when switching apps until you can actually start interacting with the app as shown in the video. You always need to start scrolling a second time as the first interaction doesn't get recognized immediately after switching apps (It doesn't matter if you use gestures or the old navigation buttons)
Yes, it's the same problem, too, there is a delay in closing applications There are many errors in the 11 update, for example, the response delay of the finger button and the screen brightness must be raised to the level of 67٪