Some of the forums post that it is either a bug with the game or if for some reason the server drops you, to just reconnect, it could have been a coincidence? It has happened to me also, but if you got banned you wouldn't be able to rejoin. I have a high ping from being in the shit whole country of Korea, no offense intended, but I really don't like this place. Anyways, back on topic, it is likely you just happened to lose connection to the server, either on your end or on theirs, or some where in between,