- Devices could not engage in FaceTime calls with devices running older operating systems, specifically iOS 9.3.6 or OS X 10.11.6 El Capitan and earlier.
- Touching and holding the Settings icon and choosing Bluetooth from the quick actions menu could fail.
iPadOS 13.4.1 also addresses a bug that prevented the flashlight buttons on the Lock screen and in Control Center from working on the 4th-generation iPad Pro 12.9-inch and the 2nd-generation iPad Pro 11-inch. Neither update has any published CVE security entries.
You can install the updates—95.4 MB on an iPhone 11 Pro and 52.2 MB on a 10.5-inch iPad Pro—in Settings > General > Software Update, using the Finder in macOS 10.15 Catalina, or using iTunes in earlier versions of macOS.
Apple undoubtedly pushed out these updates because of the increased use of FaceTime during these stay-at-home days. If you’re not communicating with any FaceTime users on older devices, there’s no reason to install these updates right away. If that is the case, wait a week or so to make sure they don’t cause unanticipated grief.