Mashup packs that were created in previous version with the latest version it regenerates the entire world racing everything that was on it. The previous version was fine and did not have a problem loading these world.
MCPE-224249
Mash-up pack worlds overwritten by seed regeneration
Resolved
Awaiting Response
0
Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response.
How old was the world before you attempted to open it in the latest version? Could you please export and attach the world from before it was opened in the latest version?
This ticket will automatically reopen when you reply.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki