Hello,
Certainly a known but not fixed issue so here it goes.
I noticed that on Pandemonium Fortress Level 2, one of the cursed chests remains cursed after defeating its enemies. Baffling, right? While this chest is consistent, I don’t suppose there is anything special about its code.
Somewhat later I killed a Gem Hoarder goblin and while it dropped its full death loot, in chat it didn’t announce to be killed. Most blue and yellow packs did.
I suspect these are some kind of events (with the goblins potentially escaping, in contrast to elites-champions being merely strong) and something on PF2 interferes.
Hope it helps.