Update 2017/10/31 - Apple has just released iOS 11.1. Check out the details [https://support.apple.com/en-us/HT208067|here]. While they don't specifically address Touch Failure with aftermarket screens, there could be some minor fixes which addresses issues that were not resolved with 11.0.3. Make sure to comment below if this update solves your problem.
Is your iPhone 6S touch not working? It’s only been a few days since iOS 11 was released yet already there are more and more reports that upgrading your iPhone 6S can cause your screen to lose Touch functionality. This mainly appears to be affecting the iPhone 6S but there are a few reports of iPhone 7 series screens with the issue. The problem affects users that had their screens replaced with aftermarket (or “copy”) quality screens.
This is a developing story so come back often to read new updates and stay up to date on this situation.