Turns out some of the baby zombies (and possibly baby zombie pigmen) can pick up loot too, but on death they don't drop it as they're supposed to (and as their grown up counterparts do).
MC-25010
Baby zombies can pick up items, but those items doesn't drop on death.
Resolved
Duplicate
0
Duplicate of MC-4150, please use the search function to see if your bug has already been submitted. Currently over 58% of tickets are being closed as duplicate.