Physical shake events are not detected on iOS 27 (24A5380h), including in Notes

UI Frameworks UIKit
CatherineAster OP
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I’m seeing a physical shake detection issue on an iPhone 17 Pro running iOS 27.0 (24A5380h).

The issue reproduces in both Apple’s Notes app and a UIKit app:

  • “Shake to Undo” is enabled under Settings > Accessibility > Touch.

  • After entering text in Notes, physically shaking the iPhone does not display the Undo Typing interface.

  • In the UIKit app, neither the UIWindow nor UIViewController responder receives motionBegan:withEvent: for UIEventSubtypeMotionShake.

  • The issue still reproduces after restarting the iPhone and removing the device case.

  • This is direct physical-device testing and is not related to iPhone Mirroring.

I filed this through Feedback Assistant as FB24200727.

Is anyone else able to reproduce this on iOS 27, either on the same build or a later build? If so, please file a separate Feedback Assistant report and reference FB24200727.

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Physical shake events are not detected on iOS 27 (24A5380h), including in Notes
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