if a zombie picks up items then turns into a drowned it wont drop items upon being killed.
Drowned won't drop his armor and weapon when were converted from zombies
Drowned not dropping player items
Piglins which convert into zombified piglins delete armor if equipped
Piglins admiring bartering gold ingot drop nothing when converting to Zombified Piglin
Piglins do not drop their gear when turned into a zombified piglin