IOS14.2 and IOS 14.3 beta is causing major issues to my iphone 8?

Probably goes without saying but these beta builds are designed for ensuring the products developers like you have created are compatible with future releases of the operating system and can be risky to install on devices you rely on for day to day usage.

Battery life is super important to our engineering team and the best way for them to determine the culprit, be it iOS or a third-party technology, is to get some diagnostic information submitted as a feedback report.

Install the Battery Life for iOS profile
https://developer.apple.com/bug-reporting/profiles-and-logs/?name=battery

Run sysdiagnose for iOS
https://developer.apple.com/bug-reporting/profiles-and-logs/?name=sysdiagnose

Though it may be a bit cryptic to read, you can comb through the sysdiagnose as well looking for something that may be culprit.

Thanks for raising the issue and feel free to post the Feedback ID here after submission.

–M

I’m going through the same issues with my iPhone 8 ever since iOS 14.2. When rebooted It works perfectly fine for some time but then it’s goes to the same issues that M0hamm3d_31 is going through. And over time and after a couple of updates it is starting to become very annoying. I’m hoping this gets fixed soon.