Notifications and quick settings panes stop working on iPhone After some time the notification slidedown and quick controls slideup(?) suddenly stop working. IOS8, iPhone 6. After reboot they work again and then again don't (after maybe several days). When the phone is locked, both panes work correctly.

What could it be and how to fix it?
This sounds like a software fault, the best solution is to backup and reinstall our phone.

This guide on Apple.com will explain how.