Did you fix it already? I have the same problem right now, I play on pc with a controller and i have a sens of 3-3 when I move my camera to the right it is significantly slower, but here's the weird part. when i tick my sensitivity by 2 which will be 5. When I move it to the right it is on normal speed, same goes to the left side. I don't know why this is happening to me. I'm sure it's not my controller because I try it with another game and the camera there works perfectly fine.