This is not the first time that this happens to me, when I’m selecting a prophecie the game buys a random one that wasn’t even an option, I believe it’s something to do with controller the last time this happened I also had a controller plugged in.
In the video you can see that I select a prophecie then the right amount of favor is traded for it and all of sudden I get the favor back and a random prophecie is bought instead(The mace one was the random one).