For me too, nearly every 14-18 rounds in a game.
But only when using this hack.
It's annoying to always receive an cooldown if the match didn't end in the next 4 to 5 minutes, because of pause and always push that reconnect button but can't rejoin, but will extend the timer.
I don't know why this happens, but it have to go with this hack somehow.
But don't ask me, I don't know what VAC does to call this error.