As I was playing a game of Mixed-Up Draft, I am resolving the sorcery Forbidden Fruit while having only three lands in play, 2 Swamps and Sanguine Morass, the back side of Bloodsoaked Insight played as a black/red dual. Forbidden Fruit resolves regularly but I don't get a Food token. While paying for Adamant, Arena incorrectly taps Morass for red for no reason whatsoever. This is counter-intuitive and there's no way the player has to be punished for not manually tapping their lands, especially since Adamant cards should be coded in a way that they always get payed for Adamant if there's the correct mana to do so.