Ipad air model A1567 uncommanded return to passcode page
I have a Ipad Air model A1567, Verizon wireless purchased. It suddenly has been intermittently, while being used, will just return to passcode page and I lose all work that I was doing at that time. What is causing this to happen?
iPad Air Wi-Fi + Cellular, iOS 11.2, Verizon Service, Model A1567