I had this problem also. I read somewhere that the screen may be bending. I had a regular Amazon bought cover on my Ipad Pro. Since the problem was not getting any better, I bought a Logitech keyboard to attach in case the touch screen went out altogether. The keyboard comes with a fairly sturdy back to attach to the Ipad. Since then, I have had no problems with the touch screen. So I am surmising that a sturdy back attached to the Ipad keeps it from bending and prevents touch screen problems. Hope this helps!