:thumbsup: Cheers for this answer Otlecs. I was having this same problem on mine when swapping windows, but I stopped using the 'Focus Follows Mouse' feature. kept killin my FPS when I'd move the cursor too close to the other windows by mistake. I'll try this next time I have this problem. Hate to have to /quit in the middle of a BG if this happened again. Or upon looting a downed boss in an instance.