[Webkit-unassigned] [Bug 211181] New: Safari users are not able to hear audio from remote participants

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211181

            Bug ID: 211181
           Summary: Safari users are not able to hear audio from remote
                    participants
           Product: WebKit
           Version: Safari 13
          Hardware: Macintosh
                OS: macOS 10.15
            Status: NEW
          Severity: Major
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jaya.allamsetty at 8x8.com
                CC: youennf at gmail.com

Created attachment 397959

  --> https://bugs.webkit.org/attachment.cgi?id=397959&action=review

Jitsi logs

In a webrtc call with around 5-6 participants, safari browser users are getting zero audio levels for some of the remote participants.
All the non-safari users can hear everyone fine. This starts happening when there are atleast 4 other participants in the call.
The remote tracks signaled by the SFU are added to the peerconnection in the remote sdp, track events are fired by the browser and then these are attached to a container.

Steps to reproduce:
Join a call on https://meet.jit.si with 4 other participants.
Checks if the safari user is able to hear everyone else.

This happens on macOS (10.14 & 10.15) very consistently using Safari 13.1. We have reports from the Jitsi community that iOS users are also experiencing this issue.

Attached are Jitsi logs for one such audio track where the issue was observed.

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