So when attacking a hostile mob while disguised as another one, it doesn't cause ALL nearby mobs to aggro towards you in the 1.19 Forge version.

(You only have to read this part if this was an intended feature)

Idk if this was an intended change but the thing i hate about this is the fact it makes everything way too easy, since you can kill off every mob 1 by 1 instead of at the same time which is what makes some fights challenging in the first place, especially if someone were to use this in a dungeon or exploration-themed modpack where the rewards you get from looting a place requires you going through waves of mobs.

(You only have to read this par

Now, why would a player attack hostile mobs in the first place if there disguised? Good question, maybe they can only get a specific item by killing a mob, maybe there in the middle of a boss fight revolved around summoning mobs. I believe the player should at least have a sense that their risking something before killing a mob.

It did do this in the beta forge version and back in 1.16.5, but currently not now.