When looking at your deck in shop, or wanting to delete a card, sometimes not all cards are shown when you have a lot, needing you to start scrolling through the cards before they're all show.
Also it's impossible to scroll to the right, which might make you unable to delete the card you wanted to delete. And since you can't cancel deleting a card, if you scroll too far to the left you can't select any card, softlocking you.