Okay, so it wasn’t just us. After updating to iOS 14.5.1 released this week, a mere 133.1 MB in size, our iPhone 12 Pro Max has been slow and laggy at times, compared to iOS 14.5. A reboot of the device seems to have fixed the some of the lag for now.
@iPhoneinCanada upgrading from iOS 14.5 to iOS 14.5.1, did you guys notices any UI and apps lagging ? 14.5 was fine for me until I updated the iOS.
— David F💪⚡️ (@KingDavidF) May 7, 2021
There doesn’t appear to be a fix in sight, but a reboot of your iPhone 12 Pro Max or other device may help fix the user interface and app lagging issues.
Others are noting iOS 14.5.1 also causes faster battery drain, plus Siri only works intermittently as well.
The video below from Zollotech shows a variety of different Geekbench scores with iOS 14.5.1 across his test devices.
Are you seeing any lag with iOS 14.5.1 installed? iOS 14.6 beta 2 is currently with developers and public beta testers–and it can’t come soon enough.