Vertical gap in one area of page left on screen with finger and pencil drawing
iPad Pro (1st generation)
As illustrated, your iPad may have a screen hardware fault.
You would be best advised to visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able to test and assess your iPad. If a fault is confirmed and your iPad requires repair, you'll be in the best possible place to explore your available options: