Normally, villager trades of villagers refresh when you haven't traded with them yet. This is not happening in my world. My villagers have been stuck with the same trades, I have not traded with them and they have jobs. When i break and replace their job block, this causes the trades to change

the affected villagers are both librarians with book trades. They both have had the same trades (an enchanted book and something else) and do not change the enchantment on the book. Also, i have left these villagers for several hours, and the trades have still not refreshed.