You can get free loot from the vault

In Minecraft preview I was experimenting with the vault and found out that if you open it and then immediately save and quit and wait a bit then go back into the game it will give you double the loot.

Steps to Reproduce:
1.Open the vault with the key and save and quit right before it starts giving items.
2.Wait a bit, if you wait too short it might only give you about 3 items.
3.Go back into the world and there should be about 6 items.

Observed Results:
The vault seems to spawn 3 items immediately and later spit out some more.

Expected Results:
There should be 3 items already on the vault and it should be spitting more out.

 

Seems to be patched in 1.20.80.24 Minecraft bedrock preview.