This bug has been reported before multiple times, and due to one interaction between Nixinova and CubeTheThird all tickets about it have been marked as resolved but this issue persists. Villagers will sometimes randomly raise their prices exponentially despite not being injured or witnessing any of their friends being injured or killed. Here's my case, I set up a trading hall on a Minecraft 1.15.2 Java edition server, I have a fisherman who was a zombie villager I cured. Again, he was not injured and did not see any of his friends get injured or killed yet his price for Cod went from 1 cod -> 1 emerald to 5 cod -> 1 emerald to 9 cod -> 1 emerald. This also occurred with his salmon trade from 1 -> 1 to 5 -> 1 to 7 -> 1. This doesn't make any sense to me so I believe it to be a bug. My issue and search process is perfectly mirrored by this ticket that I believe to be incorrectly resolved: https://bugs.mojang.com/browse/MC-156777

Please note: Other people on the server are having the same issue, it is not the result of a plugin or etc

Thank you for taking time to read my ticket