Client sound and music stops working.

After I leave my League Client logged in for maybe more than 12 hours, the sound gets completely disabled. This can be crucial when trying to find a match, or when in matchmaking. I can't hear the timers going down in the client while in match making, or searching for a game, and this has caused me to dodge queue a few times. I've tried disabling and re-enabling the sound and that doesn't work. The problem is always resolved by logging out and logging back in. Did not have this issue with the previous client. Thanks :)