iPhone 8 screen will not turn off automatically when not being used

I have the same issue (iPhone 8Plus), have done a hard reset that fixed the issue temporarily but am having it again now.

it sometimes keeps the screen on, on the lock screen!

Second hard reset done, let's hope it works and that this issue is fixed in the next IOS update

I have the latest iOS installed (11.1.1) and I still see my phone not auto-lock from time to time. Restarts, etc., are a temporary fix but the problem always comes back. This is very annoying, a security issue, and a sever battery drain issue.

The other thing I've noticed is that it is not an issue on my iPhone 6s Plus but only on my iPhone 8 Plus. Makes me wonder if it is a hardware issue.

I also continue to have this problem - even after installing the 11.1.1 update. Every week or so I have to do to shutdown my phone and restart to get the auto-lock to work. I hope Apple is working on a solution to this because it seems a lot of us are being affected 😟

I have the same issue. A restart will temporarily fix the issue but it always returns, screen stays on indefinitely unless the lock button is pressed, no matter what the auto-lock feature is set to.

I had hoped that iOS 11.1 might fix this problem but it's now failed 10 days after installing that update and restarting.

Now there is 11.1.1 - but it makes no mention of this fix.

My wife needs to ensure her phone is secure and this clearly isn't being given any significance.

I fear the phone may have to go back.

I will try raising a radar if I get a moment.

My Iphone 8+ does not turn off automatically , I have to do it manually , it's not the settings, it's the phone, yes it works fine if I shut it down and restart it but I have to do it every week, very annoying, I hope you fix this problem soon.

Same issue, iPhone 8, shut down solves for a few days and then it's back. If I look at battery usage in settings shows 65% being used by home and lock screen. Raise to wake off, auto-lock 1 min. Auto-lock, that's a laugh!!

I think I figured out the permanent fix. Change your wallpaper. I noticed I had a picture on the “locked” and “home” screen that had minor animation. I changed it to a plain/static picture, and my phone goes to sleep mode perfectly, now!

My lock and home screen pictures are from before the iPhone 6s Live Photos and do not have any animation. This is definitely not my issue. Still having the same problem. Still waiting on Apple’s solution.

I'd be interested in whether after changing your wallpaper whether this re-occurs in 2 weeks time.

The phone I have going wrong in our family did have a wallpaper restored from a previous phone (no animation though) - so it may be worth trying to re-do the wallpaper just in case this resets something important. Certainly changing the lock time didn't make a difference.

Thank you for the reply, the only solution is reboot, my 8 plus is ok, never had this bug, but my wife's iphone 8 needs to be rebooted once every 2 weeks for this one. The phone won't go to sleep. the settings are ok, same on both phones.

I posted a completed bug report link earlier on the thread, possibly people can tag on more details to that potentially capturing the log files they want (more advanced but not too hard).

I discovered my wife’s iPhone 8 hasn’t been updated to 11.1.1 but had been running almost two weeks on the previous version with no failure (but it seemed to take 2 weeks for her to get the issue - so I’m not sure what usage pattern accelerates it).

It would be useful to confirm what iOS version people have when they report the problem here and confirm if everyone gets it with 11.1.1 and if they have tied adjusting their wallpaper and re-adjusted the timeout settings.

I have had this issue since I got my iPhone 8.. I have restored it, reset it, lost everything, and hard reset it. I am very disappointed in Apple. I have done the hard restart and that seems to take care of it for a couple of weeks. Oh, also shut off the raise to wake; bummer for not being able to use yet another feature.

Same here and it started shortly after receiving it. The only way to get it to work again is a shutdown. The a few days later i notice its not auto-locking again.

Could it be an app running in the background that causes this and a restart clears it? May it works until the culprit app is opened again, starting the issue all over.