[GAMEPLAY] Q and R not working on Sion

So, I was playing Sion jungle, ranked game, doing great. My team got together since we saw our enemies and started preparing for an teamfight. We engaged, everything was okay, until all of the sudden I noticed my Q(Decimating Smash) and R(Unstoppable Onslaught) weren't working, for no absolute reason. So I was there running around smashing my ultimate which wasn't procing... My W and E were working just fine, and my entire keyboard worked perfectly in chat including letters Q and R. Note that it was kind of a late game, around 30th minute, and it happened randomly. After the teamfight, I tried to resolve the problem by remapping the keys on the other letters, but it just wasn't working. This has never happened before and if Riot can actually fix this, hopefully, beacuse I don't want to lose another ranked game beacuse of this bug (Nor I want anyone else to experience this one).