^{Edited by Mega_Spud}
Using a sword with 'Looting' enchant can cause the game to crash when mobs wearing armour are dispatched quickly. (Attacking with anything without the looting enchant doesn't cause the same issue it seems)

Steps to Reproduce:

• Set game difficulty to 'hard'
• Attack several hostile mobs that are wearing armour using a Looting III sword

(Attached world save for testing)

Tested on Windows 10 edition, version 0.16.2

This will causes creative and survival worlds to crash, and will disconnect you from a realm.

Original description:
When a sword enchants with looting III and you hit any mob the game crashes by so many items that loose the mobs