Offers proposed by librarians in 1.20.4 the experimental

With the villager new trade balance (experiment) the librarians can only give 3 different enchetment wich are Smite/Bane of arthropods/Punch (at different level: Punch I or II /Bane of arthropods III and V for example). 

This bug work only when the villager is a novice.

 

I was trying out the new villager exchanges proposed in the 1.20.4 experimental version and after many attempts (around 50) I haven't managed to get a villager to offer me anything other than Bane of Arthropods, Punch and Smite (this was in survival).
So I created two creative worlds: one with the "Villager trade rebalance" experiment and one without. The result is that without experiment it works and with it there are only these 3 enchantments available.

To get these librarians I've always used the same technique by placing a lectern.

Excuse my poor english...