Villagers do not show the real discount with effect "Hero of the village"

After a raid, I got the "Hero of the village" effect, and I tried to trade my rotten flesh with the cleric. The discount shows 14 instead of his real price of 32. However (as shown in video below), his real discount should be 23, but this 23 is crossed out instead of the 32. After the video, I successfully traded my 23 rottens for this emerald.