I play minecraft xbox one edition and i want transfer my world to minecraft bedrock edition and then I noticed that my item that I have saved in the chest they were gone it never happen before because i have done this before in 2021 it's kind frustrated i'll will keep update on this here. 

Day 2 new edit: i'm adding picture and im still losing my item in the chest after transfer .

Day 3 new edit: still waiting for answer.

Day 4 new edit: I noticed full shulker box is affect too. When i have item in shulker box they where gone too after tranfer.