Bug 241480

Summary:	[iOS] WKWebView WebRTC session loses microphone input when the app goes into the background
Product:	WebKit	Reporter:	Evgeny <ep>
Component:	WebRTC	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Major	CC:	webkit-bug-importer, youennf
Priority:	P2	Keywords:	InRadar
Version:	Other
Hardware:	iPhone / iPad
OS:	iOS 15
See Also:	https://bugs.webkit.org/show_bug.cgi?id=226620 https://bugs.webkit.org/show_bug.cgi?id=233419

Description Evgeny 2022-06-09 12:25:58 PDT

iOS WKWebView WebRTC session loses microphone input when the app goes into the background, irrespective of the app entitlements.

The sound from the other connection peer remains active.

Interestingly, while the app is moved to recent apps view (I believe, the app is in the inactive phase), the microphone input is still active, it only disappears when the app goes into the the background phase.

When the app is returned to foreground (active phase), the microphone input resumes again.

This issue can be experimented with in our app: https://apps.apple.com/us/app/simplex-chat/id1605771084

The source code for the page in WKWebView: https://github.com/simplex-chat/simplex-chat/blob/stable/packages/simplex-chat-webrtc/src/call.ts

The source code for iOS: https://github.com/simplex-chat/simplex-chat/blob/stable/apps/ios/Shared/Views/Call/WebRTCView.swift

Comment 1 Radar WebKit Bug Importer 2022-06-16 12:26:12 PDT

<rdar://problem/95321578>