So, this could be considered a feature, however, in this case I'm betting it is unexpected. So I managed to hot join somebody's game, even though they had no spectator slots, and they had also already started with me never being in their lobby. The two persons involved in said game, where: [MOdC]Pt4h and Ivan the Mildly Unpleasant. They may be able to provide additional details. Here is how I did it: Walked away from PA for about ~ 2-4 mins. Came back, attempted to join a 2v2v2 that had Pt4h in it. However, on join, I ended up not in lobby, but the game itself. It loaded the system, and allowed me to "watch" the game as a spectator. The game they where running as a 1v1. Additionally, while I was shoved in a spectator slot, I could not see units of either side. I was however, able to converse with the two. Also, the game reported Pt4h as the winner.