This has been happening for awhile. I've tried looking up the solution but it's never quite exactly what is happening. For no reason, out of the blue, a black keyboard will pop up across my screen - usually at the most inopportune times, and it won't close. Hitting the keyboard button is futile. I have to click off the screen, click back on, so it will go back to my home screen (black keyboard still present). Then I swipe above it so it asks for my security code - and the keyboard goes away to allow me to type it in. (thankfully) I adore my ipad. We have 4 iphones/ipads in this house. But I gotta say, these new iOS updates are turning my iPad into something that reminds me of a PC. Not good.