Heya!
Could you let us know if it happens every time you boot up the game or intermittently?
It happens almost every time we don't load up a single player game first, between five of us. We've taken to simply loading up SP before even trying MP.
Does it happen after installing or reinstalling the game, or the longer you have it installed the higher the chances for it to happen?
Interestingly, it didn't happen the first time I played online, it worked fine, but one of my friends crashed the very first time. As far as I'm aware none of us have tried installing it. We figured the chances of a borked install happening to all of us were pretty low.
And last, do you have the retail version, digital or preview digital?
3 of us have digital copies purchased a few weeks ago, and 2 have physical copies.
I appreciate your time!