Mouse directs camera control in super speed not able to use the mouse anymore

basically the mouse takes over the camera even in the middle of the screen, you cant control the mouse anymore because the camera goes in that direction super fast. I dont know how to reproduce this bug maybe someone else knows why it happens and how.. by restarting the client it will be fixed but it can randomly occur in game

here a link to see it in action http://plays.tv/video/5a0a0c88607152deaa/when-league-makes-your-mouse-bug-all-over-place