Yeah, I was going to ask that same question. iOS 11 has a well documented problem with certain aftermarket screens. Version 11.0.3 largely addresses that issue so I would certainly try upgrading to that version to see if it solves your problem. I take it that this was not a problem prior to updating to iOS 11.
I have written up a detailed article on this very problem. You can find a link in my profile (hopefully I can say that!?!) if your curious to learn more about this issue.