Cannot play with roommates?

Since launch I can not play a single game with either of my roommates in any playlist. Also can not play custom games together. We have an open NAT and are hard wired. When we join a game together 1 of us loads it while the others have it hang then disconnect. Every single time. How can we fix this??? We can’t even play a custom game together.

Play antithetical game together fine or on our own fine.