bought anew iPad pro 4 days ago and tonight while watching a video in the Facebook app, the screen flickered and then looked like an old tv screen with hundreds of multi colored lines and it froze. I reset using lock and home button. When screen came back there was a 4 inch section that flickered. Since then it has almost disappeared but I still see a flicker in a small portion that becomes visible more with darker backgrounds. Not happy. This is my 3rd iPad and am concerned wit his being a more serious problem.