I'm terribly sorry, but after several tests, I can't replicate the problem. (I've tried it on multiple scenarios, such as different monitor hertz, vertical monitor, fullscreen mode, window mode, different locations in-game as well, and even changing of quality)
Because of this, I'm not able to make any changes to this problem.
I'll look into it sometime in the future if I manage to find a way.
Again, I'm sorry.