Co-op campaign disconnect

My friend and I are trying to complete LASO Master and I will suddenly stop hearing party chat, then get the connection lost pop up. As soon as I disconnect from the lobby, I hear party chat and have no other connection issues. This is completely random, we’ve gone 3 hours before any issues or 10 minutes. We both have reset our series x consoles and routers, everything but wired connection which is not possible due to my router location. My friend is the host and has no connection issues with party chat or game.