The bug

If an invisible player attack a piglin that has a crossbow, they will pathfind toward the invisible player. But the crossbow-wielding piglin would get stuck in a loop of charging their crossbows while backing off and going back towards the invisible player.

To reproduce

1. In the nether run:

    /summon piglin ~ ~ ~ {HandItems:[{id:crossbow,Count:1b}]} 

2. Drink an invisibility potion
3. Attack it once
   → It runs towards you, backing off while loading its own crossbow, stops loading, and repeats this behavior.