Maps are not displayed in Classic mode.
I am creating a deck in classic mode and my cards are not displayed correctly. Goblin Auccinist and Blood Mage Thalnos are displayed in standard mode. And in the classics they are not. And the game is in classic mode, I see these cards from other players.
Do you have those cards in Classic? Remember, you’ll find some of the Cards from the Classic set in the Core Set, but those are only for Standard and Wild. You can only use cards from the Classic set in Classic mode.