This appears to still be broken in Preview 1.21.70.22.
Can you please upload a world that this issue occurs?
Uploaded a new world where the issue occurs. I also uninstalled and reinstalled the latest Preview (1.21.70.20) prior to creating this new world.
Do you have some mods installed in it?
There are no mods or add-ons installed.
Are there specific options you have turned on that may interfere with?
There were no additional options chosen. I clicked Create New World and 'Create' in the OreUI menu to create the world.
Apologies. I'm on a Windows PC running Windows 11.
Apologies, feel free to close. I apparently did not enable the Drop 1 2025 experiment.