So after I played on Jigarbov's Redstone Tutorial, every world got their items deleted, armor, and got set back to spawn.
Thankfully I just had to quit the game and come back, but this is one of the scariest bugs ever.
Related issues
Comments
migrated
[Mojang] Mega_Spud (Jay)
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-29863.
If you have not, you might like to make use of the search feature before making a new ticket, as it's likely that the issue has been reported already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Feedback – 📖 Game Wiki
==== MORE INFO on the bug ====
It only triggers when you join a multiplayer / realm game and return to your world. May also be the case with marketplace maps.