I have this issue once in awhile where I loose the ability to adjust my volume. I have this issue more on my iPad air 2 more than my iPhone 6 Plus. Started with... iOS 8 of course. If I bring up control center it looks like this: http://imgur.com/cMHDv9h And when I try to adjust with the rocker switches: http://imgur.com/pSGJV5b I can't really reproduce the issue. It just happens. Though, sometimes if happens when I dissconnect fr AirPlay, but I am not connected to any other devices as of those screen shots. A restart fixes it, but it's a hassle. Anyone have this issue too?