Has anyone seen auto dimming work on an iPad recently, or at all? I had an iPad 2 that didn't auto dim and now I have an iPad Air that doesn't work either. I've set brightness in a darkened room but the fact is that unlike my 5S which works flawlessly, the iPads do not dim automatically to changes in light in my experience. The only way I see an auto dim is to toggle off then back on auto brightness and it dims immediately but then immediately fails after the screen responds to brighter lights again. Is this a feature or a bug only iOS7 didn't work it's the same with iOS8?