Missing information in written books, signs, etc when updating.

When updating from 24w13a to newer versions, information in books and signs disappear.

What I expected to happen was...:

Books and signs keep written when I updated the game to 1.21.1.

What actually happened was...:
Signs lost what i wrote in them and books changed to "written books" with no info in them.

Steps to Reproduce:
1. Write a book in the snapshot 24w13a.
2. Update the world to the following snapshots or updates.