Manual Resolution of "Bandits" event results in traitorous Hirelings

The past two times I've manually resolved the "Cutthroat Bandits" event at the Stronghold have been just outside the main hall, and both times resulted in every hireling involved in the fight attacking me about halfway through, for no readily apparent reason.  Both times I've had to kill all of them (and the first time had a "late" traitor that attacked next time I was at the Stronghold).