I think it's normal, it's a beta.MUCH better than the first public beta on my mini 4. Still buggy, of course, but it seems way more stable. One thing I can’t get to work is “gestures”. It’s on, but swiping up with 4 fingers doesn’t work. It was in one of my reports to apple.
iOS 11 works perfectly fine on the Mini 4. It was really slow in the early betas, but on the latest it feels just as good as iOS 10. The highlight features like the new dock, multitasking, drag and drop all work like advertised.Now that iOS 11 has arrived at beta 9, how's about iPad mini 4?