The Bug
Though piglins aren't distracted by gold nuggets due to how small their are, they don't make piglins persistent even if the piglins can pick up gold nuggets.
How to Reproduce
/summon piglinthrow gold nuggets near him
Wait for him to pick them up
/data get @e[type=piglin,sort=nearest,limit=1] PersistenceRequired
→ ❌ tag is 0b / falseGet at least 128 blocks away from the piglin
→ ❌ It despawned
Confirmed