This happens to me too.
A little more information.
It only happens if you use your last card of that type. Say you have a Henrik Lundqvist card and you have 1 contract card. If you apply that contract card then afterwards you lose the ability to move to another card type or even press the back button (O / B).
If you had 2 contract cards and you applied 1 of them then you'd be able to go back.
Same goes for training / healing cards. If you use your last one you get stuck and can't go back - if you have more than 1 card when you apply it then you will be able to go back or move to another card type (R1 / L1)
