When pressing the Left Alt key whilst holding a left or right arrow key, the player keeps walking in that direction until I break the lock by sort of key mashing alt a few times. I'm using VACCiNE for movement, but I think this is related to the key that switches the menu on (which I have disabled). Alt-tab should be possible anyways, but the arrow key is obviously not getting the "key off" switch after left alt has been pressed.