Game crashes when there more 3 people in a party.

My friends and I are experiencing frequent crashes in the game whenever we add a fourth member to our party. The crashes happen randomly but consistently. Interestingly, one member of our group never experiences crashes, regardless of the situation. In our setup, three of us are on Xbox and one is on PC, but the issue also occurs in an Xbox-only party. Every time we add a fourth person, the game crashes.