Recently I have been kicked from the lobby too, but it was after the game has already started......
example:
Playing an ALT/SHOT last night, believe 1 up with one to play. One of the players on the other team needed to close out the game client (hoping to make his meter better) it brings us back to the game lobby and then it kicks me out.....
So, I restart the game window only to get the continue match/FF match question that one would expect to see, and guess what........ continue match wouldn't let me continue.
Oh well, I say....no money was on the line.