Villagers will not restock or link to new job blocks

Version 1.21.44 on PC platform. 

villager trades seem to be broken. Preexisting villager trading hall with all workstations set up correctly, villagers are no longer restocking their trades at all. Several days go by and no trade restocks have occurred. Furthermore, when I break the workstation to attempt to relink the villagers to the workstations, it appears that no linking occurs at all anymore.