Minecarts drop their loot when killed with /kill command

Summary: If there are any present minecarts in the world and you do /kill @e[type=minecart], the minecarts drop themselves despite mob loot is OFF.

How to reproduce:

1. Turn mob loot OFF
2. Summon a few minecarts (it works with most of the minecart variants) with /summon minecart
3. Use /kill @e[type=minecart]

Observed Result: The minecarts drop there contents

Expected Result: The minecarts shouldn't drop there contents