In my trading hall, I use a normal setup in which I have a captured zombie infect villagers, then I cure them to reduce their prices. However, for an unknown reason, villagers (in this case fletchers) will occasionally increase their price from the previous discount to 32 26. The first time I encountered this bug was in 1.17, while converting a group of 8 fletchers at once. The same bug occurred when converting one villager at a time as well. When going one by one, most villagers reduced their prices from 32 11 to 32 6, though one villager increased their price to 32 26, despite the conditions being the same for all conversions.