When successfully harvesting heart from prisoner, bloodlust pawn gets "Witnessed death from bloodlust", rather than "killed someone".
I can mention that in case of "Euthanase by cut" operation on humanlike he gets the right buff. When performing other 100% certain-death operation, should get this buff as well. This case is not really annoying in numbers, but rather breaks story to some extent, when pawns get wrong buffs and debuffs.
Added to todo, thanks.