Yes they do. I might post image later. But it’s kinda rare item later I killed lots of them and looted it twice after completed quest.
There is opened backpack with loot from them. Sadly we cant see loot on auto screenshots from this boss but after 2 min I have Token in my backpack.
Photos are from 16.12.2019 Also I have Poltergeist outfit so I have done the Quest.