Community rooms didn't load when I tried with 3 players. They worked with 2 players. Anyone else have this issue?

I guess, the creator of the room put only two starting positions.

Hi. Number of spawn points doesn't affect that. If there is only one spawn point, all players will spawn there.

Maybe someone in the group has a low end PC, the community rooms aren't as optimized as the base game.

Could you detail your problem a bit more?