Something is wrong with Airplay in iOS. Sometimes Airplay will not wake my AppleTV and will get stuck. Other times it will wake the AppleTV but when you close the app playing the media (Tunein Radio usually), it will stop streaming until you come back to the app. Both situations require a Reboot to fix. Also in the menu where you choose the media output the options will be scrolled past the window. you can still scroll and choose them but just a little annoying. All this is on my iPad Mini 8.1 and iPad 2 8.1.1.