Изменено (compliantJ5K): 4/8/2019 6:36:21 PMYup having this same problem, I did blind well tier 3, 4 lost sectors, ascendant challenge and random enemies kicking around the areas, all without dying and it didn't register. I said F this and deleted it. Edit: I'd like to add that I've done this bounty before and I've never had this problem.
75 enemies without dying. I usually get it done in a lost sector.