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             Nighttime Power Cycling Bug Afflicts iPhones and iPads

   Adam Engst

   [1]Reports are making the rounds about a bug in iOS 17 and iPadOS 17
   that causes devices to shut off at night and restart in the morning.
   The giveaway is being asked for your passcode because the iPhone or
   iPad has restarted. For confirmation, check Settings > Battery > Last
   24 Hours, which will show a gap if the device was dead to the world
   overnight.

   Doug Miller broached the topic on [2]TidBITS Talk, sharing screenshots
   from his iPhone and iPad, both of which decided to shut down for hours
   on the same night. Notice that the iPhone screenshot on the left has a
   pause icon and lacks the green background and lightning bolt of the
   iPad screenshot that indicates charging. But the graph shows that the
   iPhone must have been charging because it's fully charged when it
   restarts around 7 AM.

   My iPhone suffered the same problem the next day, but my screenshot
   looks like Doug's iPad screenshot in terms of icon and background, so
   it doesn't add anything new. In contrast, Dana Schwartz posted a
   screenshot that shows the pause icon and white background along with
   the comment, 'Charging was on hold due to iPhone temperature.' Dana
   said the iPhone was sitting bedside charging, just like every other
   night, so there's no external reason it should have overheated. Notice
   that when the graph resumes, the battery level is higher than before
   the pause but not fully charged. The differences suggest that the bug
   may have multiple triggers or effects depending on other variables.

   It's odd that the bug hit so many people in the last week, and while
   most were running iOS 17.0.3, plenty were still using earlier versions
   of iOS 17, and one person experienced it with the developer beta of iOS
   17.1. A very few people claim they've seen it in [3]earlier versions of
   iOS, but such reports are exceptions.

   For many people, these restarts aren't all that problematic. I mostly
   don't care what my iPhone does or doesn't do while I'm asleep as long
   as it's fully charged and ready to use when I wake up. However, [4]some
   have missed alarms, and calls that would have woken you up could be
   lost. If you have a can't-miss alarm for an early morning flight or
   essential meeting, set a backup on another device until Apple addresses
   the bug. We hope that happens soon.

References

   Visible links
   1. https://www.reddit.com/r/ios/comments/174exft/my_iphone_just_turned_itself_off_for_4_hours/?share_id=eI8ktdXuZWkEPKIf6kSxu
   2. https://talk.tidbits.com/t/weird-restarts-at-night-after-updating-to-ios-ipados-17/24822?u=ace
   3. https://www.reddit.com/r/iphone/comments/174cu90/iphone_restarting_itself_at_night_ios_1703/
   4. https://www.reddit.com/r/ios/comments/173syyo/iphone_14_pro_powered_off_during_the_middle_of/?share_id=V1w3cs2HsyKM37HbrT7OU

   Hidden links:
   5. https://tidbits.com/wp/../uploads/2023/10/ddmiller-restarts-scaled.jpg
   6. https://tidbits.com/wp/../uploads/2023/10/dana-schwarz-restarts.png

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