While playing Brawl, opponent played Aether Channeler and chose the 2nd mode, attempting to return my commander (Tifa Lockheart) to my hand. The client gave me a popup to choose whether to put Tifa into my hand or command zone. I chose "Hand", but the card was not put into my hand and instead remained on the battlefield. When I started my next turn, Tifa did not untap, nor did her landfall trigger go on the stack. Also, I tried to cast an aura to enchant Tifa, but the client would not let me select her.