can connect to all servers but no matches

Hello all,

Since I downloaded the latest update I have been able to quickly connect to the game itself and to any server with no problems or latency. However, every time I join a game, after being normal for maybe 3-4 seconds, I lose my connection and lag out regardless of the server. I know it's not my internet as I have had the same ISP for 2 years and have never had this problem. A few times when this has happened I've tested my ping on an external site right away and it came back as 50 which is around what I get in game. I've already done a clean re-install. Any ideas?