Apple released the iOS 17.0.3 update to correct a bug causing iPhones, especially the iPhone 15 Pro, to overheat.
A second update, iOS 17.1 beta 3 corrects a bug that drained iPhone battery life due to increased power consumption when the device was paired with an Apple Watch running watchOS 10.1.
Apple did not disclose the power consumption bug until after after the release of iOS 17.1 beta 3.
watchOS 10.1 bug caused Apple Watch to drain iPhone battery - 9to5Mac
Warning for iOS 17.1 Beta Testers: Update to Beta 3 or Your Wallet App May Crash - MacRumors
iOS & iPadOS 17.1 Beta 3 Release Notes | Apple Developer Documentation
iOS 17.1 will make the iPhone 12 legal in France again - The Verge