GoKawiiliPhone 18 Pro's under-screen Face ID triggers reboot bug in iOS 27
Some iPhone 18 Pro and Pro Max users are reporting that their phones freeze and reboot when a Face ID scan fails while unlocking app-level protections like Passwords or private Safari tabs. 9to5Mac says it reproduced the issue on a European unit, though the bug doesn't appear to affect every device or trigger from the standard lock screen.
GoKawiil's interpretation of the reporting above, not reported fact.
This is the first major software hiccup tied to Apple's redesigned under-display Face ID hardware, and it raises questions about how thoroughly the new sensor was tested before shipping. Since the flaw looks software-based rather than a hardware defect, Apple support's suggestion of a hardware swap could mislead affected customers into unnecessary repairs while a simple iOS update might fix everything.
- New under-screen Face ID on iPhone 18 Pro models is linked to random freezes and reboots.
- Bug triggers specifically when Face ID fails while unlocking protected apps, not from the lock screen.
- Apple support reportedly suggested hardware replacement, but the issue is likely a software bug fixable via update.
Source: 9to5mac.com — Benjamin Mayo, 2026-09-21
Published there as: “iPhone 18 Pro Face ID bug causing system to crash and reboot for some users”
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