Ok, jumped into Friends in Low Places on EH, for a fast run with a friend. He was late, I solo'd it till the end fight, then ran out of sp. So I ddor'd back to the beginning to shrine - right about the time when he was entering the quest. Running through ... and all the mobs are back. Huh? Did I take a wrong path?
Nope. I couldn't get back to the end fight - the quest reset on EN. Everything - kill count, mobs, the whole works. Crazy! Kind of neat bug, but wow, annoying if you're pressed for time.