[iOS 26 beta 9] App is moving to Background when user rejected the GSM cellular call.

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Created 5d

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We have an application WAVE PTT(Push to talk) and Application is in foreground state, When a user receives a cellular call and it is in the "ringing" state and application receives a VoIP APNS(video call) which is reported to CallKit.

User rejects the Cellular call from CallKit UI, application Video call is also getting rejected (separate feedback - 19017978) and Here the issue is observed that an Application moved to background(OS26 beta 9). Issue is not observed in iOS 18 and older versions. Frequency : 1 out of 3.

Please refer the sysdiagnose logs in below reported feedback ID. Feedback Ticket ID: 20187309

Syslogs Snippet reference: default 2025-09-10 12:30:06.991950 +0530 WAVE PTX 0x10e078100 - ApplicationStateTracker: UISceneDidEnterBackground

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DTS Engineer OP

Apple

4d

Please refer the sysdiagnose logs in below reported feedback ID. Feedback Ticket ID: 20187309

Looking the data over, I think that's pretty clearly a bug. By design, your app doesn't have any control over it's foreground/background state and I don't see anything in the log that would indicate a specific intention, nor can I think of any reason why we would do this.

As I noted above, there isn't anything your app can do about this but the one thing that might be helpful is reproducing this with Speakerbox*. That removes your app from the investigation as well as making it easier to reproduce for the engineering team.

*Note that this is my recommendation for basically "all" CallKit bugs. Reproducing it with Speakerbox proves your app is not involved and, more to the point, if you can't reproduce the issue with Speakerbox, then it's possible you may be able to resolve the issue yourself.

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Kevin Elliott
DTS Engineering, CoreOS/Hardware

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