Librarian Villager only provides Bane of Arthropods, Protection, Punch, and Smite

Librarian Villagers will ONLY provide variations of 4 enchants and nothing more when trying to reroll their trades.

What I expected to happen was...:
Roll for different enchants.

What actually happened was...:
I am only getting variations of Bane of Arthropods, Protection, Punch and Smite. NOTHING else. I spent at LEAST and hour trying with MULTIPLE villagers