I can't start a game with 40 cards, only when my deck is 60 cards does it allow me to click Play. The suggest lands feature also fills the deck up to 60.
It might be that the sealed deckbuilder is expecting a 60 card deck because also when I went to add lands it suggested way too many. Right now my 40 card deck is unable to select "play" but if I add 58 cards (weird) the play button becomes available...
Apparently, you can't start a match with a 40-card deck in Competitive Sealed league, feels like the system considers this deck size insufficient and auto-suggestion tries to fill it with basics up to the size of 58.
