Put the summary of the bug you're having here
What I expected to happen was...:
Trading with a Librarian villager
What actually happened was...:
Instead of displaying the first item, it displays the second.
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...
you don't have any books which are required for the trade, thus its defaulting to the second item which is a trade you can actually complete
Edit: If this is not the issue, attach a video showing the issue to help