For some time now, I have been unable to use Armitage pieces on my Heavy Escort Carrier. When I try to purchase them, the game says I need to purchase the Armitage pack from the Z-Store, which I already own. When I press the button to buy, the games says that I already have the item in my inventory, but still does not allow me to complete the transaction. I sent in a Bug Report months ago and nothing was ever done.
I have just confirmed that I am not the only one with this issue, as another user just tried the same thing and got the same result.