It appears that some users are having issues with iOS 14.5.1 and ipadOS 14.5.1, ranging from problems installing the update, to battery issues or a hot iPhone / iPad after install. These type of problems are usually rare, but they can happen to some users after virtually any system software update, and thus these circumstances are generally not specific to this release.
Like most iOS and iPadOS updates, these issues are usually easy to resolve if you experience them.
Problems Installing iOS 14.5.1 / iPadOS 14.5.1
Most issues with installing software updates…