Bug with buying Crystal Curse and loosing 500 money

I defeated Royam with 2x Crystal Curse in my deck.

After that, I went to Mannie Dex to upgrade my deck and saw, that he also sold 2x Crystal Curse. So I bough them 2 times. But the number in the shop didn't go down, although the bar on the right side went up. And after checking my inventory I discovered, that I didn't get new Crystal Curse-cards, nor other new cards. I tried it a third time, no change. And only after going back to the menu, Crystal Curse vanished from the shop.

So because of the autosave, I spent over 500 "money" without getting single card. This kind of kills the whole playthrough...