Wrong amount of price when selling stack of Scrolls of Wisdom

Hi there!

I was playing today, currently in the Act 2, and I noticed that when I sell an stack of Scroll of Wisdom the selling price is the same as if I would sell only 1 unit. I sold one scroll and I obtained 2o and then I sold 8 scrolls and obtained 2o as well.

I don't know is this problem is known, I'm new reporting this kind of things in games so I hope it helps.

Have a nice day!