My iPad Pro 12.9 was spastically unresponsive to touches on the screen when I typed on the keyboard. Some times I would continually tap on one or two keys and nothing! I took off my case and no issues. I got to thinking and realized that I had the case folded up so the magnetic cover that turns the iPad on when I opened and closed it was on the back of the iPad. I decided to try turning that function off and it worked! No issues!!I turned off Lock/Unlock feature under settings/display brightness for the iPad cover and now no issues. Don’t get rid if your case or cover, just turn that feature off. Hope that helps ;)