Put the summary of the bug you're having here

What I expected to happen was...:
The armor stands and item frames and the items on them remain when coming back from the end

What actually happened was...:
they all disappeared?!

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. place an armor stand and an item frame in the overworld
3. go to the end

4.come back from the end

5.the armor stands and the item frames disappeared