Some chunks are flattened to bedrock after enabling the Caves and Cliff experimental feature

I've converted an old world to the latest version without issues (the world is OK).

Then, I've enabled the Caves and Cliff experimental features and some nearby chunks have been flattened to bedrock...

Here is my world if you want to check (more than 10 MB): https://share.maicol07.it/kOfI5/ZeXUMeDo70.mcworld