After I play for 15 minutes or so, making feed, food, harvesting, I can no longer make food or feed because the icons to make these have fallen half way off the screen. It's like my board has expanded 10% and I can't use anything on the edge. I am not full in my silo or barn. If I click the half off icons, nothing happens. If I quit and restart my game, all is back to normal. I am playing on an iPad1, OS 5.1.1.