PFID-7691C7FBC3FFDEF7
I had this same issue happen to me.
I went back and played the scenario again. A bunch of the cards that I lost were in my discard (for example, when I started the scenario I had 15 cards in my deck and 10 in my discard). Once I completed the scenario, I still had those discarded cards in my decks. So I think I managed to recover most of my cards.
I have a couple that I know I'm missing.
Characters: Seoni, Harsk, Merisiel, Kyra
Sagacity
Bolstering Armor
Force Sling +3
Bewilder
Dominate
Blizzard
Disintegrate
Invincible Breastplate
Adamantine Plate Armor
Headband of Epic Intelligence
Belt of Physical Might
Sihedron Ring
Poor Of Zarongel