This is odd, maybe not a bug but I wasn't sure what to make of it. I got the Drox Guild mission to get the Scavengers and Fringe to make peace with each other. The Scavengers would agree but I would always get a rejection message saying that the Fringe wouldn't make peace with the Drox Operatives. I thought maybe that was since I was allied with the Scavengers, and they'd need to make peace with both of us, but it wasn't totally clear.
Later I thought maybe if it was my alliance that was blocking a peace treaty between Scavengers and Fringe it would be better for me to cancel the alliance, and when I went into the view treaties screen this is what I saw. Nothing game breaking for sure, but a little messy.