Villager cannot re-gain job site after being cured.

What I expected to happen was...:
The villager would gain a job site at the position of the Lectern.

What actually happened was...:
The villager does not have a job site.

Steps to Reproduce:
1. Trade with a Librarian.
2. Allow the Librarian to be converted to a zombie villager.
3. Cure the Villager.
4. The villager can no longer gain a job site.