Sion is so BUGGY

Sion for me (Ended Silver 2 last two seasons, in Bronze 2 right now) has been a fantastic pick! I have won 8 games in a row with him. But lately he has started bugging out, like whenever I ulti'd a talon that was invisible... I guess that it didnt register that it was off my ult, and the screen locked on me, even whenever i pressed Y (or T, i don't remember). Also mid game on another one of my games my Q and R stopped working, for no reason. Still won both of them cuz he is just too op, BUT FIX THIS RIOT PLZ!