I was playing around with what aggros the zombified piglins, and decided to hit a ghast fireball towards a horde of zombified piglins. they angered at me, which i was pleased to see, but what i was rather surprised to see was the zombified piglins continuing to chase me after going into spectator mode. i then played around with other mobs with similar behavior, and i could only find zombified piglins exhibiting this behavior. the closest i got to replicating it with another mob was with bees, who upon angering will swarm the player, but as the player enters spectator mode will stop following the player while still exhibiting other angry behaviors (i.e. red eyes). after further experimentation, i found that zombified piglins will act this way when hit by a player normally (and not the obscure way that i did initially)