Dear iOS 27 users, don’t panic if iOS 27 feels a little weird on Day 1. 👀
After a major iOS update, your iPhone may spend some time doing background processing, indexing and downloading additional resources. So battery drain, warmth or slightly reduced performance can happen
Yeah, iOS 26.6 did optimize the Spotlight index to prepare for iOS 27. But iOS 27 rebuilt the entire Search system, so it still has to do a full reindex after the update. That’s why you can still see extra battery drain and warmth on day 1.