TOPIC: Csgo bug???

So i was playing csgo just now, and in every 2 games i played my sound went off. i couldnt hear the game sounds anymore and i couldnt hear my team talking anymore. Im sure i didnt mute the game or anything and whenever the game was done and i got back to homepage the game sound/music started working again. I cant play like this, so does someone got a solution for this maybe?

alt + f4
jk i get this aswell i dunno what it is