Sion Glitch with Q

I was playing Sion today, and his Q seemed to not work anymore by endgame. Whenever I pressed the Q key, I would hear the click that is heard normally, so it isn't my keyboard that is the problem. It was if he didn't have a Q. This problem happened during the last couple minutes of my game. I had a baron buff, so I think that might have something to do with it. I'd appreciate it if you kept us posted! -Chewblasta-