this bug report can be closed permanently. I had forgotten that I had used NBTExplorer to update an old world manually, but I did not add the update_1_21 datapack. by adding the update_1_21 dtapack, the issue is resolved.
Pigface
this bug report can be closed permanently. I had forgotten that I had used NBTExplorer to update an old world manually, but I did not add the update_1_21 datapack. by adding the update_1_21 dtapack, the issue is resolved.