Angry villager becomes more expensive every time I right click him.

A villager who was angry at me (killed a travelling merchant so he had raised his prices) raises his prices every single time I click to trade with him, until it caps at 64. When I break his workstation and re-place it, the prices rise again.

What I expected to happen was...:
The price should remain the same until I at least start trading with the villager, like my other villagers do.

What actually happened was...:
I have not even done a trade with the villager before, he has 0 EXP. His prices should not change aside from him being mad at me, which he already was.

Steps to Reproduce:
1. Kill something in the village, causing your villagers to become upset with you, and raise their prices (I killed a wandering merchant, and his two llamas, specifically).
2. Select a villager and note the prices crossed out, signifying the price increase. I am using a librarian in particular in this instance, but I was able to make him a weaponsmith and it still kept increasing.
3. Exit without trading, and continue to look at his offers. Each time the prices will increase slightly.
4. Resetting the villager (Break workstation and place it back down) will still cause this to happen.