When you unload chunks with item frames in it, the item frames will dissapear, and there is a small chance that they will stay.

alright, so I was playing normally, being really mad because I was trying to make a 3x3 map thingie with item frames but was having difficultys, and I went back to the chunk after it unloaded, and everything disappeared. I hit the block, and the item frame and map fell out of the block...?

What I expected to happen was...:
I thought the maps in the item frames would stay normally

What actually happened was...:
The item frames disappeared

Steps to Reproduce:
1. Place down an item frame. An item in it is optional. These items can be retrieved.
2. Unload the chunk / Leave the area
3. Go back, and the item frames disappeared. Destroy the block they were on to retrieve the item frame and item.

I can't upload files, screenshots wouldn't help either. Try it out yourself, you will get the same bug.