[MC-152751] Horse armor can occasionally be duplicated when killing a horse wearing it with Looting III

Killing a horse wearing armor with a looting 3 enchanted sword has a very small chance of dropping more than 1 armor.

Get an item with looting on it

/give @p minecraft:stick{Enchantments:[{id:"minecraft:looting",lvl:100},{id:"minecraft:sharpness",lvl:100}]} 1

Summon a horse with armor

/summon minecraft:horse ~ ~ ~ {ArmorItem:{id:"minecraft:diamond_horse_armor", Count: 1b}}

Kill the horse with the item that has looting
→ ❌ The horse dropped two horse armor

Attachments

Can reproduce. Here is an easy command to get a sword that doesn't drop a bunch of leather.

/give @p minecraft:diamond_sword{Enchantments:[{id:"minecraft:looting",lvl:50}]} 1

EDIT: Working in all 1.14.2 snapshots.

Affects 1.14.2-pre4