When I try to play on Arma 3 with Battleye on, I have a massive FPS drop each time I try to move my mouse or each time I'm pressing the keyboard. This FPS drop makes a small freeze everytime and it makes the game impossible to play. I've also noticed that when battleye is off, the same bug is happening but it only applies on the mouse. Also, if you move the mouse/hold the key a longer time (15 seconds for example), the game will stay freezed for some minutes. The last thing that helped me on servers was to press Lshift once and press the walking bind at the same time. The freeze would happen, but after I was able to walk without any kind of bug until I released the key.