matches loading late or not loading at all for last 2 days.

For the last 2 days my game has been loading after 2-3 rounds are over and then no lags whatsoever. But deathmatch and team deathmatch doesn't load at all. The map screen goes away when the match is over. I don't think it's a connection issue because everything else is running fine and my average ping shows 40-50. Anyone knows what could be the problem?