I've said before - Redmi 2S, choppy animations, framerate drops, black notification dropdown menu and a bit sluggish performance overall.
Funny that I don't see this while switching desktops, only unlocking animation and returning to homescreen.
I'm also having this problem. Neither rebooting nor changing the themes worked.
Besides that, my Redmi 2S has become noticeably sluggish and started stuttering a lot even on screen unlocking since updating.