I'm having the same problem as tpierce66.
My problem though is with the Potion of Glibness.
I keep having the same problem with Mend.
iPhone 6 Plus, iOS 10.1.1, ver-704-20161114
In Quest Mode I am playing against Black Fang as the boss. I have had a problem with the Potion of Glibness card causing it to not let me progress. The ONLY actions I can do is click on an image in the discard display to enlarge the visible cards OR drag the highlighted card (Thieves Tools) down to my hand. There is a back button (the red "X") but when I click it nothing happens, it doesn't register. When I drag the card down to my hand, it clicks back to where it was. Nothing I can do to get pass this.
Please help!