as a coda, I ended up restoring from an older backup.
I can see this resolved as a duplicate, but the alternative bug hasn’t been linked. can I please get that linked to this so I can review that bugs' notes?
Hi, what are the next actions with this? My world is still broken, so I can either revert to the world with entities and lose my progress, or try and merge the entities into the latest release.
If the only option is to accept the loss, I'll have to close the world permanently and start again, which is a sad end.
I reopened an older pre 1.16 world on my xbsx, and villagers that had been zombie cured from a spawner had lost their zombie doctor discounts, so there is a deeper issue with entity handling in bedrock between versions.
(historical note: link to worlds folder will expire on 1st Feb 2026)
Apologies for the delayed response. this link has a copy of original and 1.31 visited versions of the working and non-working worlds:
mojira
Mode LastWriteTime Length Name
la--- 27/12/2025 12:33 PM 1,538,641,373 Terra Localis-120.4 (univisited).zip
la--- 27/12/2025 12:36 PM 1,467,534,944 Terra Localis-123.2 (univisited).zip
la--- 27/12/2025 12:32 PM 1,538,970,381 Terra Localis.120.4-alive.zip
la--- 27/12/2025 12:33 PM 1,468,641,435 Terra Localis.123.2-dead.zip
Thanks for linking. the symptoms appear common, but I think I've added some key information, that my mass entity loss was triggered by a world upgrade. switch users (or users not maintaining BDS) wouldn't necessarily notice a world upgrade took place. The evidence was the stripiness of the corrupted world map vs an uncorrupted one in my uploaded pictures, but also the entity count dropping by hundreds/thousands.