Larian didn't go into details about exactly how or when this problem could be triggered, so I'm not sure how far back you would need to revert to be sure to avoid it. Someone mentioned reloading a save before entering the headquarters for one of the flying fortress bosses, and still encountering a problem, but I don't recall if anyone reported back on reloading saves before first entering the fortress, etc.
Support usually has a relatively quick turnaround time.
