[Webkit-unassigned] [Bug 230538] New: [IOS 15] Video track does not get unmuted in case of tab was inactive less than ~500 ms

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230538

            Bug ID: 230538
           Summary: [IOS 15] Video track does not get unmuted in case of
                    tab was inactive less than ~500 ms
           Product: WebKit
           Version: Other
          Hardware: iPhone / iPad
                OS: Unspecified
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: olena.bezkrovna at enghouse.com
                CC: youennf at gmail.com

Steps:
1. Start video
2. Put to the background and back to foreground right away or switch to a different tab and return

Actual result: Video is not restarted, also visibilitychange event is not fired
Issue is not reproducible on IOS 14.7
Can be tested on WebRTC sample - https://webrtc.github.io/samples/src/content/getusermedia/gum/

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