[Webkit-unassigned] [Bug 234509] New: iOS Safari 5.1 - Can’t access the camera via WebRTC after switching between apps multiple times

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=234509

            Bug ID: 234509
           Summary: iOS Safari 5.1 - Can’t access the camera via WebRTC
                    after switching between apps multiple times
           Product: WebKit
           Version: Safari 15
          Hardware: iPhone / iPad
                OS: iOS 15
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dimitri at scandit.com
                CC: youennf at gmail.com

(The report including all necessary links to screen recordings, and the sample to reproduce is also available here https://docs.google.com/document/d/1IfhLzjz0IEo_sBLJiAvlQx1T-58ceQ3wZU3V6u2wCr8/edit)

iOS Version:                    15.1.1
Safari Version:                 15.1
iPhone Model:                   iPhone 12 Pro
Browser Details:                https://whatismybrowser.com/w/WXTABX7 


Reproduction Rate:              100%

Sample to reproduce:            https://drive.google.com/file/d/1fyklTMm2SUE0uOBQYKVV1Qp_eqwxeLal/view
                                https://safari-15-webrtc-issues.netlify.app/  

The sample is based on the official WebRTC Demo (https://webrtc.github.io/samples/src/content/devices/input-output/). The only difference is, that we added a manifest.json to make the demo “installable” without the Safari search bar


Screen Recording:               https://drive.google.com/file/d/15pFe2Myk7h7_q6U6FTmd9k8oK11nX6ZV/view



*Prerequisites to reproduce the issue*

1. Open Safari 15.1
2. Go to https://safari-15-webrtc-issues.netlify.app/ 
3. Install the website on the iPhone Home Screen ( > Share Icon > Add to Home Screen)
4. Use the installed website from the Home Screen to reproduce the issue


*Steps to reproduce the issue*

1. Open the app
2. Grant camera access
3. Switch to another app putting the app in the background
4. Return to the installed web-app
5. Repeat steps 3 and 4 30+ times


*Current behavior*

WebRTC can’t access the camera anymore. The icon which indicates camera access (red, on the top left) is blinking. Camera access can only be restored when completely closing and restarting the app.

Note: Only the camera feed is not working anymore, other (native) UI elements like select are responsive as they should.


*Expected behavior*

Camera access is working after coming back to the installed web app. If the browser can’t access the camera due to missing permissions, the browser should ask for permissions again.

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