The NPC never fight again the creeper without a explosion , it is destroy all the building and structure so many time, it so annoying. I think that you must delete that order (put it back just like 1.7.10), because let the NPC fighting again creeper is the worst idea ever :(

The NPC that i say in this issue is the Melee Combat NPC and this is version 1.12.2

So I don't like the fact that some entities are somehow not aggressive to NPCs but I understand the frustration from creeper holes when in fact NPCs can't fight these well. For now I am adding creeper to exclusion list in confing by default. But I will probably take a look at this in the future and see what else can be done to make the attacking logic smarter and creepers to hate NPCs again even by default.

And this one is released as well.

Thanks dude

Hey dude, i dont want this. In survival mode, NPCs is hard to made, and they cant not fight again creeper without been dead , please set back like before, the creeper is aggressive to NPC but dont damaged them, please :((

I figure it out, haha, thankyou so much :))

You probably haven't refreshed config. When I am testing this creepers don't care about NPCs at all unless they are hit by them by accident.