This bug is very bad for players with good stuff so please fix as soon as possible

I was just joining my brothers world and all of my stuff was gone! i had such good stuff and it was all lost. it has happened to my brother as well! so its the second time its happened to my family please fix this bug now.

 

 

Sorry but i can't send a screenshot on this because my computer doesn't have a camera so you guys will need to just trust me.

Thank you!