The bug

Piglins with unenchanted golden swords don't seem to switch their current weapon to an enchanted one. They'll just put it in their inventory after inspecting or contemplating the enchanted gold item, this works with armor as well. I'm unsure whether this is intended.

How to reproduce

1. Summon a piglin with a golden sword
2. Have an enchanted golden sword and drop it near the piglin
3. The piglin inspects the enchanted gold item
   → The piglin does not switch to an enchanted item.