Camera problem in ow_citadel

I was playing normally as Overwatch, the round ends, i am rebel, and in the next round im Overwatch again. Here comes the problem. If i pressed D, the camera didnt go right, it went diagonally right up. If i pressed up, it went diagonally left up. If i pressed left, it went diagonally left down. And if i pressed down, it went diagonally right down. After some rounds, i was Overwatch again and the problem was solved. It was today and never happened again so far.