In a draft, I had a 2 drop and 5 lands, i played nissa with the intent to untap my forest and play a vine gecko. It asked if i wanted to make it a creature, i said no, i just wanted the untap. it untapped my forest, leaving me with two lands... perfect, vine gecko is 2 mana.... nope, arena just passed my turn for me. I didnt click the end turn button or pass this turn or whatever they are, the client made that decision for me, and it cost me the match. resolving the nissa +1 ended my turn.