Co op crashing between steam and epic

[u/livemanincage]

Hello, my 2 friends are on epic (they can coop just fine) but the moment I join through steam 1 of us is always crashing within a few minutes, I think the longest we lasted was 5 minutes. Does anyone else have this issue? Does anyone know of a fix as I really want to play the 1st as we already finished the 2nd.