They all do it to a slight degree but it is unnoticeable on all my devices except the Mini 6 which exhibits the issue blatantly. I.really wish people would stop saying that all 60hz LCD displays have the same problem.It’s definitely there as it’s a function of how the technology works. Even Apple is on record talking about this and I can see landscape orientation jelly scroll on my iPad mini 5 in my hand right now.
As you said in the subsequent paragraph… how much you notice it is simply a function of which orientation it is lined up with
As for Apple, they just dismissed it but then they have form for that kind of thing.