Nasus gets stuck in a unskippale 'slow mo' animation

When you are playing Nasus if you are fighting multiple things (enemies, minions and jungle creeps), if you are auto attacking a target and then quick switch to another target while you press q (as if you were just going to quickly last hit it to get the stack) this glitch occurs. Your character slowly faces the new target of the Q and he slowly raises his stick and slowly hits down, and the damage does not take place until the animation is over. You are stuck in this animation without being able to get out of it... almost like you are stunned for 1.5 seconds.