Cards vanishing between scenarios?

[Kreniigh]

Occasionally I will add a character I haven't used in a while to my party, and before I can go into a scenario, I have to add a card or two to their decks because apparently some have vanished.  I'm wondering if this is a glitch, or maybe some cards just get removed from the game after a certain point -- for example, I could see Aldern Foxglove being retired after the Skinsaw Man is defeated.  Or are there some cards (maybe Loot) that cannot be owned by two characters in the same party, so one of them gets removed when the characters are put together?

 

 

[Pengw1n]

Loot and treasure cards are limited by the amount of owned (in vault), so party duplicates gets deleted - which can happen when you mix and match characters.

Edited October 22, 2016 by Pengw1n