[Gameplay] No game volume, Happens at random.

There's no real way to recreate this bug, as it happens at random times for no reason. Upon entering a match, (I only play summoner's rift so it may just be that map) I'll have no sound. I've left matches and reconnect before minion spawn to fix this, and it usually works. Once in a while it'll stay muted. I've checked settings both in-game and out, and there seems to be no reason for it. I'm not sure if it's just me, or... But there won't be ANY sound whatsoever. (Yet the sound/music on the login splash screen is fine, and on the main page, so it's not my client or files i don't think.)