Unique Map - Essence bug, happen to me in 0.2 and 0.4

I enter the unique map of essence, i fight the small essence and they drop loot (filter off). when i fight the 4th one he died but did not drop loot like all 3 other. And i can't click on the big essence boss, no text about what essence he have either. Happen to me in 0.2 and again in 0.4. (Can't get my 2 atlast point, getting hard to find 5 different unique but now need 6 this one dont work for me)