After the release of iOS 15.4Apple on Thursday released a small update called iOS 15.4. Addresses a battery drain issue along with a security flaw Apple says it “may have been actively exploited” on some devices.
Some iPhone users took to Twitter to complain about battery drain after installing iOS 15.4. Apple Support responded to these customers with Twitter It is normal for some apps and features to be configured “for up to 48 hours after an update”.