Ever since the most recent windows 10, my FPS on Overwatch (which before the windows 10 update was constantly at 300) now has the three dots next to the fps counter and now my fps flickers from 120-250 constantly, it is never stable. I just want to know if this was because of the windows 10 update or if there is something else causing the issue. The three dots, I've been told, are to do with rendering things in game so that is most likely the issue.
Specs:
CPU: i7 8700k
GPU: ASUS ROG STRIX GeForce GTX 1080ti O11GB
MB: ASUS ROG STRIX Z370-E
Power Supply: Corsair RM850i
RAM: G.SKILL TridentZ RGB 16GB DDR4-3466