Villager doesnt give a dicount after curing.

I cured 5 villagers and only one of them gave a dicount, I tired to cure them again but I only got a small discount for example librarian give 22 emralds and 1 book for 1 looting three.
I have tried reloading the game but it does change even if I cure them again. They usually just die if I try a third time.
Changing profession removed all discounts.