Player data and world data are not usually saved at the same time, causing item loss or duplication

It is possible to lose items from a chest or even duplicate them if you quickly put items in a chest and then close the game as soon as possible. This is also a repost of MC-63 for Bedrock.

Steps to Reproduce:

1. Gather all the items you want to duplicate as well as a chest.
2. Place your chest.
3. Save & Quit, and then rejoin the world you just placed the chest in.
4. Place the items you want to duplicate in the Chest.
5. This step is optional. Wait any amount of time, ideally a few seconds.
6. Quickly forcibly close the application. On Windows, you can also use the task manager.
7. Rejoin the game and the same world you did the glitch. One of three things will have happened to your items.

Expected Results: 

Nothing will have happened to your items in the chest or the inventory.

Observed Results:

There is a chance the items will have duplicated or the items will have been deleted, depending on timing.

Notes:

This glitch does not always occur and the results depend on timing.