Huh. I wonder if its random/depends in how many hunting quests you've completed?
I believe it does, not so much main quests. I remember it popping up after taking a base but I can't say that one caused the other with 100% confidence. I could be wrong, my memory is crap, but I think there is a base south of the Doctors, liberate that and all should be well.
I will not be pushed, filed, stamped, indexed, briefed, debriefed, or numbered! My life is my own.