Hum I've came here for the same issue. I was playing a game, finished (17/2, pretty proud of it), and after updating it tells me the same.
Should we send a ticker or sth? I've barely spoken and it's always a Have Fun, Good fight, GG, messages. I guess this might be a bug, I din't even pause unnecesarily. And I'm a 7k hours DotA player with excellent behaviour score.