Apple has released the first update for its latest mobile operating system, iOS 27, version 27.0.1, to fix a bug that causes the iPhone 18 Pro and Pro Max models to freeze or restart unexpectedly. The issue typically occurs when the Face ID feature is unable to authenticate the user. One user reported experiencing both freezing and complete restarts while trying to log into an app using Face ID. After installing the update, the user hopes the problem will be resolved. To apply the update, iPhone users should navigate to the Settings app, select General, and then tap on Software Update. When iOS 27.0.1 appears as an available update, they should tap the button to install it immediately. Restarting the device after the update is recommended to ensure that everything functions correctly. The update also addresses a specific issue where a color artifact appears in photos taken at 2x zoom under certain lighting conditions at f/1.48. This affected a small number of iPhone 18 Pro and Pro Max models. Another bug fixed in the update prevents the screen from freezing when opening the Notification Center and Control Center at the same time. This means that iOS 27.0.1 is available for all devices currently running iOS 27. Alongside the iPhone, the iPad, Mac, and Vision Pro have also received their first updates. However, Apple has not specified the exact bugs these updates fix. The company has not listed any security patches in its latest security update documentation, suggesting that this is a standard update focused on resolving software issues. The update is compatible with the iPhone 11 and newer models, as well as several iPad models including the 4th generation iPad Pro 12.9-inch and later, and the 6th generation iPad mini and later. According to research by the 9to5Mac team, the Face ID-related restart issue appears when using the feature to unlock certain apps and functions, such as the Passwords app, private tabs in Safari, and other programs protected by facial recognition. If Face ID fails to authenticate the user and the "Try Face ID Again" button is pressed, the affected devices may freeze and restart after a few seconds. The reason only the iPhone 18 Pro and Pro Max models are affected may be due to the placement and design of the facial recognition sensor. Unlike previous models, where the Face ID camera was integrated into the Dynamic Island, the new 18 models have the camera located under the screen, to the left of the Dynamic Island. When using Face ID, users can see a small white line appear briefly under the time display, indicating the camera is active. This is not the first time Apple has had to address unexpected restarts with new devices. Last week, Apple released WatchOS 27.0.1 to fix a bug causing random restarts in the Apple Watch Series 12 and Ultra 4. One user who experienced the issue found an entry in the diagnostic log pointing to timeouts at the watch's Neural Engine. Bugs related to new features are common with the launch of new operating systems and devices. So far, Apple has shown a quick response by providing the necessary fixes.