This error happens in the corner where you see whos killed and died it spamms it about 50 times. it says host ended game (what usually happens LOL) but the game carrys on , onto a new map. it happened twice to me in the same game.
Ive gotten this error as well, and from what I can see returns to lobby and changes map. no body gets kicked from party/lobby except 1 person. (Which is a result of the last COD4 patch they came out with. Rather then completely get kicked out of the lobby and have to resend invites and rejoin lobby, when ever a host leaves it sends you to the lobby to await a new map. hope this helps.
well, this happens alot with me.. it says host ended game but you end up in the lobby with all players, when it starts again it says again "host ended game"