Llama or donkey can be used to copy items!!!

1.When I destroying the end_portal_frame, and place the lava under the frame
2.I put items in the chest which on the llama (or donkey). Then attack it to 0.5 heart(1 blood).
3.Push llama (or donkey) into the lava, and llama (or donkey) will die and drop items.
4.Go into the end_portal_frame, I can find "another" llama (or donkey) and my items still in the chest. So items are doubled.

We can recurrent in most of version of Minecraft:Java Edition and different computers.