Piglin and piglin brutes getting attacked no longer aggravate other nearby piglins and piglin brutes when attacked behind walls. They only go after players if they're visible infront of the attacked piglin. Due to this, it makes bastions a bit easier to explore and loot as only the attacked piglin chases after its attacker, meaning that players can stealthly kill most of the piglin inhabitants one at a time without calling others for help.