Update iOS 11.2.1, which was available to iPhone, iPad and iPod Touch owners last night, fixes the problem with autofocus, which complained to many users of iPhone 8, iPhone 8 Plus and iPhone X after installing iOS 11.2. This is reported by readers of the portal MacRumors.
The problem was that the camera could not focus on the subject. It either constantly "tossed" between the two lenses of the iPhone 8 Plus and the iPhone X, or simply could not catch the "focus" without manual intervention. Resetting and changing the settings of the camera did not help, so the owners had to "roll back" to iOS 11.1.2.
Now they can safely update to iOS 11.2.1, because Apple has fixed this bug. A new version of the operating system allows you to restore remote users access to HomeKit, which was temporarily disabled due to a vulnerability in the platform. The fact of existence of the vulnerability exposed serious danger to people who use "smart" door locks and garage gates.