Item was lost.

I'm running an integrated version of Microsoft on Nintendo Switch. And as for the content of the bug, I play Minecraft online with my friends. I was playing with that friend yesterday and decided to quit, so I ended Minecraft. And one day later, today, I tried to enter Minecraft as I did yesterday, and I was able to enter. However, it was returned to the initial spawn point and spawned in a different position than where it ended last time. In addition, all the items were gone, and even the items that should have been in the ender chest had disappeared. I thought this was strange and reported it. I have reported so that there will be no victims like me. Please analyze and fix the bug.