[Webkit-unassigned] [Bug 259884] New: REGRESSSION (iOS 17 Beta): Outgoing and incoming video and audio do not recover if iOS User receives PSTN/FaceTime call in the middle of the WebRTC call

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=259884

            Bug ID: 259884
           Summary: REGRESSSION (iOS 17 Beta): Outgoing and incoming video
                    and audio do not recover if iOS User receives
                    PSTN/FaceTime call in the middle of the WebRTC call
           Product: WebKit
           Version: Safari 17
          Hardware: iPhone / iPad
                OS: Other
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: madara.freimane at testdevlab.com
                CC: youennf at gmail.com

Summary:
REGRESSSION (iOS 17 Beta): Outgoing and incoming video and audio do not recover if iOS User receives PSTN/FaceTime call in the middle of the WebRTC call

Tested devices:
The bug is reproducible on:
- iPhone 11 Pro Max (iOS 17 Developer Beta 4, build: 21A5291j) and Safari (V17)

The bug is not reproducible on:
- iPhone 8 Plus (iOS 16.5.1) and Safari (V16.5)

Use case:
Precondition:
Safari browser opened
User is an active video WebRTC call

Steps:
1. iOS 17 User receives a FaceTime/PSTN call
2. iOS 17 User accepts a FaceTime/PSTN call
3. iOS 17 User or another User ends the FaceTime/PSTN call
4. iOS 17 User observes incoming, outgoing audio and video

Actual result:
* Incoming and outgoing video do not recover untill iOS 17 User and other Users re-enables cameras, but sometimes when iOS User re-enables camera, the video is not sent again and it is impossible to get video back.
* Incoming and outgoing audio recovers after a long time, approx. 20-30 seconds, sometimes only outgoing audio recovers and sometimes it is not possible to get audio back until User leaves a call and rejoins it with a fresh browser.

Expected result:
Incoming, outgoing audio and video recovers if the FaceTime/PSTN call is received in the middle of the WebRTC call

Reproducibility:
100%

Additional information:
-Sysdiagnostics file added:
https://drive.google.com/file/d/1bE8Pubt2tc6Cc1ff2r8wncWmy0M_CSRl/view?usp=sharing 
(bug reproduced at 16:19, EET, 07.08.2023.)

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