Have you been host or client?
Do you own the companion DLC?
How was the configuration of the companion?
Did all players use the companion or just you?
Until now there were many reports about that issue, but in some cases everything went fine. In general it’s no problem if just the host uses the companion. That still may lead to disconnects for the clients or the host, but that seems to depend on which modules for the companion are used.
Oh. And one more question: did you play with friends or did you join random multiplayer sessions? (Is it possible that you just got kicked out of the session because of using the companion?)
i had the same problem , when ever one of us 4 players use a companion , it kicks us all and sets the host offline , we don’t know what causes it. We are able to deploy then but if we start walking or engage in combat it kicks us all.
i’m the only one of us 4 with the DLC
we each have different companion loadouts so unsure on that part
and its in a multiplayer session with steam friends