Overwatch : Mouse cursor's location is wrong

I saw this bug on other forums, but none of them could provide me a fix on linux.

So, basically, I have a 2550x1440 monitor, but I use 1080p in overwatch because my hardware can’t handle more. The problem is : I have to move my mouse cursor up and left to click on any button in overwatch menus.

An example of the same problem :

I don’t know if I can ‘disable display scaling on high DPI settings’, as if I were using windows…

Any ideas ?