Villager Profession Bug

What I expected to happen was...:
The villager to return back to his work site.

What actually happened was...:
Another villager took his place bugging out the other villager.

Steps to Reproduce:
1. The Processioned Villager must walk outside of his work zone to trigger no one uses to work stand
2. A Unemployed villager takes the work station of where the villager who walked to a little off.
3. When the villager who wondered away comes back you cannot open his/her trading GUI and they both are the same profession.