Divination Cards get Doubled doesnt work?

Hello

OK i got a Apothecery (Mageblood card) from a Strongbox in my Desert Map.
I have the Keystone to double Divination Cards from Strongboxes.
And the apothecary didnt get doubled. WHY?



The map was my own map no Kirac mission map or what so ever.
It was no Divination Card Strongbox
The Desert map CANT drop a apothecary card so it has to be dropped by the Strongbox

the loot on the ground looks like that a monster got touched by something and dropped a lot of cards. But can the strongbox monsters drop the card when they are in a Desert map ?


please explain it to me.