Activated abilities of cards won't work. I was playing with Maze's End today and I could activated its ability. The ability screen would appear but I couldn't choose any of it. The same thing happened to Pupu UFO and Ugin, Spirit Dragonas well. The only way of exiting the screen in the screenshot was conceding. I was playing againt Sparky in the screenshots, but against real player I would have to wait until my timer runs out. Now I can't activate land abilites or planeswalker loyalty. This seem to happen with cards with multiple activated abilities such as lands, planeswalkers and cards like Pupu UFO that has 2 activated abilities.