The auto thumbnail for a deck only displays in the corner of the deck editor after saving the deck for the first time. It only displays in the deck selection screen after saving the deck an additional time.
Bug reproduction steps
Create a new deck and don’t set a thumbnail. Save and exit. You will see that the deck doesn’t have a thumbnail in the deck selection. If you then enter the deck it will show you that a thumbnail is set in the bottom corner. On exit the game will ask you if you want to save any changes although you didn’t change anything. If you then save, the thumbnail will display properly.
Screenshot OR error code
After saving the deck for the first time, the thumbnail should be displayed in the deck selection screen even if it’s one you didn’t choose manually.
Auto thumbnail for a deck only displays in the corner of the deck editor after saving the deck for the first time
Fixed, will be on next update.