My older redmi has this issue where once a accessibility service was killed, it had to be disabled and enabled with the 10s mandatory wait because xiaomi. Miui also disables a bunch of APIs like 3rd party apps cannot change the wallpaper or the running services option present in most ROMs. This isn’t to ignore the aggressive app killing behavior of miui. Overall, my experience wasn’t great. Oneui is a much better and more stable experience, IMO.
You can read the threaded version of the tweets here: https://threadreaderapp.com/thread/1691693740254228741.html