Wow client acting weird plz help

While playing wow window sometimes minimize and then maximize again automatically and half icons go blank and invisible and each time time i have to to /reload, very frustrating inside arenas especially. The problem is more often while looking with mouse over, gear items or profession recipes.
Changing full screen mode to windowed doesn't help. Also haven't bothered changing much graphic settings. Minimal client didn't help also and deleting cache folder.
I am using win10 x64 and ati radeon.

FIXED by changing dx11 to dx9 in advanced settings.