Bug 259924 – REGRESSION (iOS 17 Beta): Incoming and outgoing video and audio are lost when iOS User navigates to Youtube and back, call becomes broken

• Component: WebRTC
• Status: RESOLVED CONFIGURATION CHANGED

[Madara Freimane]

Summary:
REGRESSION (iOS 17 Beta): Incoming and outgoing video and audio are lost when iOS User navigates to Youtube and back, call becomes broken

Tested devices:
Bug is reproducible on:
- iPhone 11 Pro Max (iOS 17 Developer Beta 4, build: 21A5291j) and Safari
- iPhone 11 Pro Max (iOS 17 Public Beta, build: 21A5277j) and Safari

Bug is not reproducible on:
- iPhone 13 (iOS 16.6) and Safari
- iPhone 14 (iOS 16.5.1) and Safari

Use case:
Precondition:
User is in active WebRTC call
Permissions for camera and microphone are set to "Ask" in browser settings

Steps:
1. iOS User navigates to Yotube and tries to listen some songs/video
2. iOS User navigates back to the browser after ~1min

Actual result:
- Incoming and outgoing video and AUDIO are lost when iOS User navigates to Youtube and back
- Sometimes the iOS 17 User is not able to  play a song/video in the Youtube/Spotify or another appp where we can listen an audio/watch the video. If iOS User navigates between videos/songs, it is possible to play a music somehow.

Expected result:
Incoming and outgoing video and audio recovers after the navigation to Youtube/another app and back

Reproducibility:
80%

Additional information:
-Sysdiagnostics file added:
https://drive.google.com/file/d/1KOvDMHjoOnLjMB55Wh8Oe0lUjkDHmv01/view?usp=sharing 
(defect reproduced on 08.08.23 at 11:50 EET)
-The bug is similar that was at the beginning with iOS 16:
https://bugs.webkit.org/show_bug.cgi?id=243982

[Radar WebKit Bug Importer]

<rdar://problem/113588160>

[youenn fablet]

@Madara, can you reproduce on the latest iOS 17 beta?
From the sysdiagnose, it appears we have some interruption issues similar to https://bugs.webkit.org/show_bug.cgi?id=259368, whose fix was not in 21A5291j or 21A5277j.

[youenn fablet]

(In reply to youenn fablet from comment #2)
> @Madara, can you reproduce on the latest iOS 17 beta?

If it is reproducing, can you tell on which website (say https://webrtc.github.io/samples/src/content/peerconnection/pc1/)

[Madara Freimane]

Hi, Youenn!

I am not able to reproduce this anymore, but sometimes I see that Safari page refreshes when I come back from Youtube. Could be related to https://bugs.webkit.org/show_bug.cgi?id=260388 

Tested devices and browsers:
- iPhone 11 Pro Max (iOS 17 Developer Beta 7, build: 21A5319a) and Safari
- iPhone 14 Pro (iOS 17 Public Beta 5,, build: 21A5319a) and Safari

Thank you!