I have issues with vibration toggle on two different devices (Redmi note 3 sd, Redmi 3). Has someone else the same issue? (The toggle does not deactivate vibration mode, it s always on even if the toggle is not highlighted)
I think it's a problem of the system. I've installed all the updates from 6.4.14 till 6.5.12 and no one of them produced the shell problem. A factory reset could solve it.
I don't think that uninstall "shell" is the best solution. Probably something went wrong during the flashing but a factory reset could solve the problem. I had the same problem with the first release of dev ROM for Snapdragon version. Now I'm on 6.5.12 and everything it's OK.