Make it easier to tell how many cards are left (and when it's out)
I know that in the base game there is a limit on the number of cards, and if you are playing the physical board game, you can tell approximately how many are left. It would seem that you can't tell when the game is out of cards, other than simply not being able to buy them (which is hard to differentiate between that or when the interface bugs are preventing you from buying a card).
At the very least tell us there are not more cards when we try to buy it. Or even better, give us some idea of how many cards are left on the stack (as you could see in the real world)
Prinz der Sterne
@MonkeyZ yes you are right, you can't see how many development cards are left, this is really (another) problem.