MCC regions not working on system with LIVE Gold

Wierd little thing that my partner and I noticed when we went to play multiplayer on the MCC. I have the game on windows and they have it on our series x, my account is on there and has gold, theirs does not have gold. When on their profile the regions list completely glitches out and can’t play multiplayer, but on my profile the regions load just fine. I know gold is supposed to work for all the accounts on the system, so I tried to find an answer but can’t see one, so if anyone has any suggestions that would be great, Thanks!

Edit: Screwing around with it further, it works if I log in on the series X and start the MCC, then log out of it and pull it up on theirs it suddenly works.

Is your Series X set as your home Xbox?