[Webkit-unassigned] [Bug 233020] New: Safari freezes when receiving call on device with iOS 15.2 Beta

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=233020

            Bug ID: 233020
           Summary: Safari freezes when receiving call on device with iOS
                    15.2 Beta
           Product: WebKit
           Version: Safari 15
          Hardware: iPhone / iPad
                OS: iOS 15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: vfarley at nvidia.com
                CC: youennf at gmail.com

If you receive a call on your iOS device while you have a local stream setup, then attempting to setup a peer connection while the notification banner is present results in the entire website freezing and becoming unresponsive.  The only way to stop this behavior is by reloading the page.

The steps to reproduce this bug are:
1. Open https://webrtc.github.io/samples/src/content/peerconnection/pc1/ 
2. Click the "Start" button, allowing microphone and camera access when prompted
3. Call the device 
4. When the call notification banner is visible on the top of your screen, press the "Call" button
5. Swipe away the notification
6. Observe that the webpage is frozen/unresponsive

Able to reproduce on iOS 15.2 Beta.  Unable to reproduce on iOS 15.1.

Expected behavior: After swiping away notification, video resumes.

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