Hi !
mi mix 2 here. From 8.2.1 to 8.3.15, lots of force close on launcher, permission issues preventing the app from applying the theme from what i've seen. I can go to settings but "themes", "permissions" panels force close.
will try to update to 8.2.1 > 8.3.1 before
edit: same from 8.2.1 to...