Bug 246331

Summary: [iPhone 14] User cannot unmute WebRTC call and loses incoming and outgoing audio after receiving PSTN call and declining it
Product: WebKit Reporter: Madara Freimane <madara.freimane>
Component: WebRTCAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Critical CC: joma, webkit-bug-importer, youennf
Priority: P2 Keywords: InRadar
Version: Safari 16   
Hardware: iPhone / iPad   
OS: iOS 16   

Description Madara Freimane 2022-10-11 03:24:23 PDT 
Summary:
[iPhone 14] User cannot unmute WebRTC call and loses incoming and outgoing audio after receiving PSTN call and declining it

Tested devices and browser:
Bug is reproducible on:
- iPhone 14 (16.02, build: 20A380) with Safari
iPhone 14 (16.0.3, build: 20A392) with Safari

Bug is not reprodudicible on:
- iPhone 11 (16.02, build: 20A380) with Safari
- iPhone 11 (16.03, build: 20A392) with Safari

Use case:
Preconditions:
Users (also iPhone 14 User) are in active audio/video WebRTC call 

Steps:
1. iPhone 14 User receives a PSTN call
2. iPhone 14 User declines the PSTN call
3. iPhone 14 User tries to unmute the WebRTC call

Actual result:
Incoming and outgoing audio disappears and iPhone 14 User cannot unmute WebRTC call (unmute button not responding)

Expected result:
WebRTC call goes to "unmuted" state automatically after the PSTN call. Remote participants in the WebRTC call can hear iPhone 14 User again.

Reproducibility:
100%

Additional information:
-Sysdiagnostics file added:
 https://drive.google.com/file/d/181R5Tou-8x4Qryb8tQW4l2-W-kniRrTW/view?usp=sharing
Comment 1 Radar WebKit Bug Importer 2022-10-18 03:25:17 PDT 
<rdar://problem/101285001>
Comment 2 Madara Freimane 2022-10-26 04:04:13 PDT 
Bug is still reproducible
Tested device:
iPhone 14 | iOS 16.1, build: 20B82
Comment 3 Madara Freimane 2022-11-11 08:11:00 PST 
Bug is still reproducible on iPhone 14 (iOS 16.1.1,  build 20B101) with Safari
Comment 4 Madara Freimane 2022-11-15 10:20:51 PST 
Hi, @Youenn!
 I am not able reproduce this bug anymore with iOS 16.2 Beta 2, build: 20C5043e, iPhone 14.
Comment 5 Madara Freimane 2022-12-15 08:13:43 PST 
Fixed => Bug is not reproducible anymore.
Tested device:
- iPhone 14, iOS 16.2, build: 20C65

Thanks!
Comment 6 Joyce Ma 2023-01-19 14:14:57 PST 
This issue is still reproducible after the second PSTN call rejection on 16.2.

However, it is fixed for the initial call.

Are there any updates for this bug?