The bug I'm encountering when I play is after a first time completion of a difficultly,
at the gold reward screen I will get a Zero instead of the expected amount of gold.
I speculated at first maybe I'm not being awarded my gold because I am a commuter and sometimes,
I'll start a Story Quest at work then commute and lose my connection then finish the quest at home.
But its also happened to me when I've played a full Story Quest at home with a stable internet connection.
I've unfortunately been unable to narrow down what causes it, just that it does happen randomly.
iPad Pro 9.7
iOS 9.3.2
Version: 480-20160602