I apologize for the delay. Also, I'm sure that these bugs have one source - when after beta version the world is launched from the regular version - Beta APIs are enabled. Also you have a file size limit here so I had to upload the world to google drive, I had no other choice. https://drive.google.com/file/d/1qmU9OKIxkk2UMPa-BM9Nu92bP52NnAzb/view?usp=sharing
Having these features include changes to the world unwanted by the player. How can I replicate this if the latest experiments are the villagers, and those obviously won't be the soonest innovation?
Step 1: Enable the desired experiment in the created world
Step 2: Wait for the full release of the experimental function to disappear
Step 3: Enjoy the non-disabled features.
All the mobs I've lost are the ones that were on a lead.
1.20.10.**
I have no backups from that long ago.