Haven't seen this on any of the devices I have updated. But I wonder if it could be related to the new iOS 27 index rebuild and that it's stealing resources from the device? None of the device I am using have AI enabled and that might also be a reason why I haven't seen it.
This is how AI describes the pre-indexing of Spotlight that's going on.
iOS 26.6 optimizes and pre-indexes your device's Spotlight database in the background to prepare for the upcoming iOS 27 release
. This proactive step prevents the multi-day search re-indexing delays previously experienced by beta testers, ensuring a faster transition and immediate readiness for new Siri AI search architectures. [
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Background Optimization Details
- Purpose: Re-architects and catalogs local data contextually so the heavy lifting for iOS 27 is done beforehand.
- Performance: Reduces the prolonged days-long indexing phase when you eventually upgrade to iOS 27.
- Action Required: No manual steps are needed; the phone handles the cataloging automatically in the background after installation. [1, 2, 3, 4, 5]