Disconnections When 2 People Use the Same Internet

When playing with my brother, who uses the same internet as me, we get disconnected upon loading into a match. When in my dorm, not using the same internet, we have no problems. I’ve talked to other people, who have confirmed this isn’t an isolated issue. Any of you guys know how to fix this?

Enabling Relays in the Network tab within the Options Menu seemed to have helped my brother and I. Occasionally our internet will still crash, but it has been noticeably better with it enabled.