Here it’s one boss : andy, p8 increase it for the whole game and make LK chest run a thing.
That being said, it does not compare at all to P8, in term of exp, uniques, runes etc… Hence why personally i wouldn’t mind to either see it become standarized or deleted, either of those to avoid people not knowing said bug to get frustrated over it. Which does have a point : a character that was intended for farming and that disconnected before talking to warriv will be crippled for life in term of andy farming. This guide will review the major attributes of Unique Bosses in D2:R, including Immunities, Auras, and special abilities such as Cursed, Cold/Lightning/Fire Enchanted, and Extra Fast/Extra Strong. That being said, he didn’t state all bosses, but simply Andy (and baal eventually) Welcome to Wowhead's guide to Boss Attributes and Abilities in Diablo II: Resurrected.
Personally i don’t really care that much if this bug stays or not. Point is not if it’s already a thing, I like that bug and would like to keep it as well, just what jedi said is to make all bosses drop quest bug on every kill in D2R is the same thing as allowing you to do players 8 on the basis of it changing the loot table odds significantly for certain high demands items, I would love to farm demon limb or stormlash that way would be amazing, but it’s the same thing as players 8