You can only play cards once per turn, so the cards you got back from the deck swap will be "disabled" until you end turn. I think it visually needs to be a bit more clear though
I'm pretty sure I remember this being different before, so I infer this is a (very reasonable) balance update. However, after this change, some cards like deck swap, resurrection, and bent arrow become almost useless except under very, very specific circumstances.
I would gently suggest those cards may require revision.