I can not seem to use this card to generate a resource at all. Once played it never becomes an option to use it.
I have just tried it and it works for me. For instance, in the following situation:
Notice that you first need to select the card you want to play (Warlock, in this case) and then you select the resources. In this case, you can simply select the double resource card and Friction Resistance (notice that it has a circle with a red resource).
Hope this helps!
Yes, because Deft Focus and Friction Resistance are different types of cards. Deft Focus gives you an action that lets play a card at a discount. It is an action, so you need to activate the action and THEN play the card. Friction Resitance gives you a resource: you use it to pay for cards (or other things that require resources). Thus, you invoke it when you need to pay for something. In the case of playing cards, that is AFTER selecting the card to play.
So what is implemented in the app is the correct way of using these cards. Even when playing physically, that is the correct order: first you select the card to play and then you generate the resources.