[Webkit-unassigned] [Bug 247994] New: Outgoing audio does not recover automatically and "Microphone" stays in muted state after the PSTN call if User puts browser in the background and makes PSTN call

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247994

            Bug ID: 247994
           Summary: Outgoing audio does not recover automatically and
                    "Microphone" stays in muted state after the PSTN call
                    if User puts browser in the background and makes PSTN
                    call
           Product: WebKit
           Version: Safari 16
          Hardware: iPhone / iPad
                OS: iOS 16
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: madara.freimane at testdevlab.com
                CC: youennf at gmail.com

Summary:
Outgoing audio does not recover automatically and "Microphone" stays in muted state after the PSTN call if User puts browser in the background and makes PSTN call

Tested devices:
Bug is reproducible on:
* iPhone 14 (iOS 16.2 Beta 3, build: 20C5049e) and Safari
* iPhone 11 Pro Max (iOS 16.2 Beta 3, build: 20C5049e) and Safari
* iPhone 13 (iOS 15.7.1) and Safari

Scenario:
Precondition:
User is in active WebRTC call

Steps:
1. User puts browser in the background
2. User opens Native Dialer app
3. User makes outgoing PSTN call, another User accepts it
4. User opens Safari browser, returns to WebRTC call
5. Another User ends PSTN call

Actual result:
Outgoing audio does not recover automatically and "Microphone" stays in muted state after the PSTN call if User puts browser in the background and makes PSTN call

Expected result:
Outgoing audio recovers automatically and "Microphone" changes muted state to unmuted after the PSTN call if User receives PSTN call in the middle of WebRTC call

Reproducibility:
70%

Additional information:
-Sysdiagnostics file added (bug reproduced at 23:59, 16.11.2022, EET time zone):
https://drive.google.com/file/d/1yG0Z1BxRLRK8zT-Z6GXu1Zw1EZD-3ZbV/view?usp=share_link

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