Hello guys. I am starting to lose hope now.
This bug persists since iOS 10, with 9.3.5 and below it was super-smooth. Since iOS 10, some games (including all Supercell games like Clash of Clans, Clash Royale etc) are stuttering. You can reproduce it like that: In Clash of Clans login, click on your defense log. Scroll. You will see stutter. Close your defense log and swipe+scroll your village. Try to read your clan name. It will be hard because of very bad stutter. Most of times the stutter fix for a few seconds if you click on your profile and scroll. I have uploaded a video about Clash Royale stutter:
Does not lags at 0:00-0:26 then starts lagging after 0:27, you can clearly see.
All Supercell games behave like this after iOS 10 update. Stuttering. You can see at the first it is smoooth but when I go to the shop and back to my cards, stutter started. Tested with 6 devices with iOS 10, all of them have this issue. With iOS 9.3.5 this problem was not here.
If i release my finger, stutter go away but if i touch screen and scroll, it stutters.
It is very sad they still didnt fix this iOS 10 bug... :/