Horses can drop multiple horse armors when killed with looting

When you kill a horse using looting it can drop multiple horse armors.

How to reproduce:

1. Get a looting sword.
2. Equip a horse armor to a horse
3. Kill the horse with looting

You might have to try it very often because it is random.

What I observed:The horse sometimes dropped two horse armors. 

What I expected: The horse always drops one horse armor. Silent whisperer showed it in a video. https://youtu.be/gfPf83JOsCs