Flickering mouse cursor

I haven’t played SC2 in a while, and while in-game my cursor is flickering. As far as I can see, it’s related to the framerate. The higher the frames (and more stuff happening on the screen) the more it flickers. When there’s less frames or when the screen is static (loading a game) it is definitely better. Is there a solution to this?
I tried scanning and fixing, reinstalling the game, changing all kinds of settings - to no end.

Just as a reference, I’m also playing Diablo 3, which is graphically similar and have no issues with the cursor.