As of right now, if you play with 3 people in a party, the game decides which two players will be partners, and then that decision is permanent. It never switches back and forth, and you can’t choose which party member you’re partners with. When I say permanent I don’t just mean in that session, it is quite literally that way forever. Whenever the three of you play together it is the same two together and the odd man out every time. For instance, I’ve been playing with my brother and friend, and they’ve been together every time while I’m with a random. We’ve easily played somewhere around 100 games together, so no it isn’t just bad luck, for some reason the game chooses who’s with who and then it’s permanent. This definitely needs to be fixed.