I just had something similar happen, where we also loaded into the game despite missing a person, but we were not stuck inside a telephone booth. We could play the whole map, as if a game was going on, but no one had health bars or orb totals. We could not see the minimap. We pushed the enemy patron, then at some point during killing the weakened stage, the game just ended. Now, it does not appear on my match history, so I can't say the game ID.