Shortly after Apple launched the iOS 17.3 beta 2 update, the company was forced to suspend the update process because some users reported that their iPhones became bricked after applying the new version of the operating system, and Apple withdrew the iOS 17.3 beta version.
Apple officially issued an official statement saying that the iOS17.3beta2 version software "prevented a small number of devices from starting." Some believe the boot loop issue is related to the "back tap" gesture of tapping the back of the device, as the problem only occurs on iPhones of users who have disabled the feature.
However, affected users have a fairly simple way to fix the problem. Just enter recovery mode and roll back to the previous iOS version, then wait for Apple to release the more stable iOS 17.3 version.