Many iPhone X uses are facing issue with screen always turned on issue. iPhone X screen stays always on, and never goes to sleep. This is causing huge unnecessary battery drain. The same screen reaminin on is reported with iPhone 8 as well. iPhone X/8 screen will not turn off automatically when not being used unless right hand button is pressed.
While the user touch the screen to wake but don’t unlock it, the screen simply sits there ON and never turns off. Screen won’t turn off unless I press the sleep/wake button. Some users say that issue goes away after a reboot but comes back after day or two.
There are no updates from Apple regarding the issue, but some user after replacing their iPhone X did not face issue again on new device but some of them faced same issue on replaced device which is very strange.
However there are some fix/workaround for iPhone X screen wont turn off issue as given below, please try them and let me know if it helps.
Fix 1: Shake to undo
Turning off Shake to undo fixed the issue for many users. It is recommended that you try to turn of this feature.
Fix 2: Reset passcode/FaceID
1. Turn off passcode at Settings > Touch ID & Passcode > Turn Passcode Off.
2. Restart your device.
3. Turn on passcode at Settings > Touch ID & Passcode > Turn Passcode On. (Do not delete your saved finger prints.)
Fix 3: Keep upgrading to latest iOSThis issue may be caused be Apple software new releases/features and there are great amount of chanes that Apple fix the issue in upcoming release. So please Upgrade to latest iOS software whenever available.