This issue has been around since 1.18.20. 
 

Steps to replicate:

Step one- place down workstations of your choice. (In my test I placed 5 Lecterns.

Step two- spawn zombie villagers.(one for each workstation)  (You can also just place normal villagers but for the sake of ensuring none have jobs I place zombie villagers. 

Step 3- Start the curing process to turn zombie villagers into normal villagers. 

Step 4- wait till the turn normal and watch which workstations they take. (In my testing they completely ignore the stations and randomly have a job. There is no way I know of to make them lose this randomly picked job.) they are supposed to take the jobs corresponding to the workstations around them.

Expected Results: Villagers take jobs from workstations nearby 

observed Results: Villagers will randomly pick a job not corresponding to the workstations nearby. 

there is also another issue where if you just spawn a normal villager they will just have a random job. None of the villagers will ever lose their jobs. Making player made structures such as trading halls a lot less useful as you can’t control what villager does for a job. This also makes job switching impossible. I can’t turn a Blacksmith who has taken no trades for example into a farmer.