I am not a 100% sure about your particular issue but usually games will soft cap frame rate at 60 fps. This is because that is the universal refresh rate of. Most games don’t allow the frame rate to go over 60 fps. Even though it may say 200+ fps it is in reality only 60 fps. WoW is an example of this. It maybe that they simply update the fps system so that it won’t write a value over 60, since 60 is the true cap.
this talks about fps a bit