I recently played a game and about half way through started D/Cing with the message "you must stay logged on to keep playing" or something like this. I just logged back in and reconnected to game and it was fine.
On about the third time when I tried to reconnect it said "the host has banned you from this match". I'm not really sure what this means.
Recently logging in has also taken a little longer than usual(when I press log in it all greys out and just takes longer to go into the home screen). Not sure if this will change anything but yeah, any feed back is appreciated.