Sporatic changing of screen from black of white to white on black
Lately when I'm reading My books the page will sporadically change from the normal black on white to white on black. This auto swiching sometimes lasts from a few seconds to a few minutes. Somes the change will last a 1/2 hour or more. I've check my Assessability settings and everything is turned off. This never happened before the latest upgrade. What is causing this? I'm concerned my Ipad May be biting the dust.
iPad, iOS 8.0.2, Ibooks