I reported that chunks of the map would swap, re-appear and disappear a while back. The issue was said to be resolved, but it wasn't and I just lost everything.It has been happening on several of my worlds and on several devices. This issue was not resolved like you said it would be and I just lost my very first home in the game.
Related issues
Attachments
Comments

Thank you for your report!
We're actually already tracking this issue in MC-161823, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki