Slight Necro, but relevant. Had the same bug with ALL the blades after the bosses, only the official DLC in common with AKQuinn. Used console to target the blades and typed "kill" to make them unconscious, then ran like the wind before they got back up. As a test, once per blade after each boss, I used the "kill" feature on them, let them get back up, and they went back through the looping dialog, start to finish. Reloading did not fix for me either. Did not have the UOP patches yet, nor the DLC UOPs either. Will test these next to see if it still occurs.