How about this for an idea...
If you are in the middle of taking your turn then all of a sudden get frozen out so you can't finish is there a way to have the card awarded?
It sucks that you don't get a card you have earned through a(several) successful atttack(s) just because you are not able to click the finish fortifications button because you are unable to get a response in the game(probably thru no fault of CC).
It's bad enough that you don't get to finish your turn and don't get to fortify. You shouldn't be penalized the card too.
This just happened to me earlier in my game 1600511.
Mike