I have searched this issue and many like it have been reported. Many of them indicate that they've been "fixed", but I cannot find what any of the actual fixes/responses are.

I built a villager breeder and trading hall (including a zombie for turning). I currently only have farmers and librarians. None of the farmers will re-stock their inventory, but the librarians next to them will. I replaced 3 of the farmers and also set up a new farmer station, but I'm getting the same results - none of the farmers will re-stock. I made a place for one to sleep in a bed for a night, but it still wouldn't re-stock.

If there's a location where the actual fixes/responses are posted for others like me to read, please send me a link, otherwise, please advise.