iOS 26.3 Beta 3 Breaks Continuity Features on iPhone 17 and iPad Pro (M5)

Apple’s latest iOS 26.3 and iPadOS 26.3 Beta 3 builds are causing serious problems for users who rely on Continuity features. If you test this beta on the iPhone 17 lineup, iPhone Air, or the iPad Pro with M5, key tools like iPhone Mirroring, Sidecar, and AirPlay mirroring stop working. As a result, daily workflows that depend on Apple’s cross-device features now feel broken and unreliable. Apple confirmed the issue in its updated developer documentation. "The following Continuity features do not work on iPhone 17, Phone 17 Pro, iPhone 17 Pro Max, iPhone Air and iPad Pro (M5) with iOS / iPadOS 26.3 Beta 3: iPhone MirroringAirPlay mirroring to Apple TV 4KUsing Continuity Camera wirelessly with Mac or Apple TV 4KSidecar from Mac to iPad Pro (M5)" What is not working in iOS 26.3 Beta 3 These bugs affect only the newest Apple hardware running Beta 3. Older devices and earlier betas do not show the same problem. The broken tools include: iPhone Mirroring, which lets you view and control your phone from a Mac AirPlay mirroring to Apple TV 4K, used for wireless screen sharing Continuity Camera, which turns your iPhone into a wireless webcam Sidecar, which lets the iPad Pro (M5) work as a second Mac display When these tools fail, you lose the main reason many people use Apple’s ecosystem. You can no longer move work, video, or calls across devices in real time. Apple has not explained why these Continuity features stopped working. Still, the company usually fixes issues like this in the next beta update. Since iOS 26.3 normally reaches the public in late January, the current delay suggests Apple plans a release in early February instead. Until Apple ships a Release Candidate or a new beta, users on the affected devices should avoid Beta 3. If you already installed it, expect broken screen sharing, camera handoff, and Mac-to-iPad workflows. For now, the safest option is to wait. Apple will likely restore Continuity before the public release goes live.