I noticed while completing the quest step from the Exotic Lament that the finishers in-game started to act weird and not connect to make the enemy die. Sometimes when an enemy meets the requirements of a finisher, it doesn't appear. Specifically, I noticed the Finisher, One-Inch Punch seems to have been acting the most strangely, finishing wise. I hope that this will eventually get patched, but in the meantime I'll just keep trying with what I have. Thank you for listening, Bungie.