Newer devices running Apple's recently released iOS 13.4 and macOS 10.15.4 software updates are currently unable to make FaceTime audio and video calls with older devices running iOS 9.3.5 or iOS 9.3.6, according to numerous users across the Apple Support Communities, MacRumors Forums, Reddit, and Twitter.

Apple normally recommends that users who cannot make or receive FaceTime calls update their devices to the latest software version, but iOS 9.3.5 or iOS 9.3.6 are the last supported software versions for several older devices, including the iPad 2, third-generation iPad, iPhone 4S, the first-generation iPad mini, and the fifth-generation iPod touch.

Devices running iOS 13.3.1 or macOS 10.15.3 can still make FaceTime calls with older devices, so it is unclear if this is a bug introduced with iOS 13.4 and macOS Catalina 10.15.4 or if this was an intentional decision. Apple did not immediately respond to our request for comment, but we will update this story if we hear back.

In any case, the timing of this is unfortunate due to the ongoing pandemic. Many affected users have mentioned being unable to reach a grandparent who still uses an older iPad, for example, during a time when social distancing is strongly recommended.

Hopefully this proves to be a simple bug that is resolved in short order.