Piglins are missing an inventory can "absorb" certain items.

Upon dropping certain items (eg. Golden Armor, Golden Apple), Piglins would rush to pick them up. However, instead of looking at the items for a period of time, the items would get "absorbed" into the Piglin and do not drop even after death (as they lack an inventory). When a Golden Sword/Golden Armor is dropped, the Piglins would not even make an attempt to equip it.