[Webkit-unassigned] [Bug 230539] New: If you play a song from Spotify while in a WebRTC call, audio output is broken until refresh

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230539

            Bug ID: 230539
           Summary: If you play a song from Spotify while in a WebRTC
                    call, audio output is broken until refresh
           Product: WebKit
           Version: Safari 14
          Hardware: iPhone / iPad
                OS: Unspecified
            Status: NEW
          Severity: Major
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: daginge at confrere.com
                CC: youennf at gmail.com

If a user starts playing a song from Spotify during a WebRTC call, the audio output from the remote party stops.

Repro steps:
1. Go to https://webrtc.github.io/samples/src/content/peerconnection/pc1/ on iOS 15
2. Click "Start". Observe that you can see yourself.
3. Click "Call". Observe that remote media works and you can hear yourself.
4. Go to the Spotify app. Observe that you for the time being can still hear yourself
5. Play any song or podcast and stop it.
6. Go back to the browser and see that camera still works, but audio output is now muted.

Impact:
All WebRTC services not implementing some kind of hacky workaround. This should just work.

Workaround:
Detection is hard, a refresh works, but it seems restarting the peer connection, or possibly re-attaching the srcObject might work as well.

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