Friend keeps disconnecting while in online play for BL2 in handsome collection

It seems like this is an old bug that’s never been fixed, as I’ve seen other posts dating back 4 or 5 years ago describing the exact thing that’s happening. My friend is hardwired into her router, while I’m using a powerline adapter, yet she is kicked from game as well as the ps4 party chat with ever more frequent occurence.
At first we thought it was an issue with her ps4 or her router, but this problem is only happening with this game. Also, I had this same problem about a year ago. The fix for me was getting off wifi and setting up the powerline adapter