Since last update (including trade) I have visited 2 villages (in survival) but I didn't found any librarian, leatherworker or shepherd. Only farmers, butchers and clerics. That's all. However there are libraries but no librarians. So I came back home and decided to retry later. But it was the same problem. So I wait a long time around both villages to see if some other villagers doing other jobs spawn. But there didn't. I don't know if it's a bug or not but I prefer report it.