Bluetooth issue on iPad mini with retina display?

I'm having an issue with the Bluetooth on my iPad mini with retina display. At first I noticed the problem when I first paired it with a Zaggs folio keyboard (I had already upgraded from iOS 7 to iOS 8 prior to connecting the keyboard). Whenever I would type with it or let it sit for a couple of seconds without touching it the display would glitch. Lines would show up on the screen and it would cause the display to glitch and move in odd directions. I thought maybe it was the keyboard causing the problem so I tried a completely different keyboard of a different brand and it still did the same thing. I then noticed that if I even had the Bluetooth on without a keyboard paired to it the lines would still show up on the screen periodically. They weren't there permanently, they would just pop up and disappear. If I have the Bluetooth turned off I don't have a problem, I don't notice any lines on the screen or any glitching at all. However, as soon as I turn on the Bluetooth the problems start back up again soon after it's turned on. I've tried resetting all of the settings and the problem still persists. Is there a way to fix this problem? Does anyone else have this same issue? I've done a lot of searching and so far haven't found anything even remotely related to the problem I'm having. I guess I just want to know if I bought a faulty iPad.