233707 2021-12-01 08:50:23 -0800 Safari freezes when navigating to Youtube and back on device with iOS 15.0.2/15.0/15.1 2022-05-19 08:54:21 -0700 1 1 1 Unclassified WebKit WebRTC Safari 15 iPhone / iPad iOS 15 RESOLVED CONFIGURATION CHANGED InRadar P2 Normal --- 1 madara.freimane webkit-unassigned webkit-bug-importer youennf oldest_to_newest 1819257 0 445579 madara.freimane 2021-12-01 08:50:23 -0800 Created attachment 445579 sysdiagnose_2021.12.01_14-36-25+0200_iPhone-OS_iPhone_19A404.tar.gz Summary: Safari freezes when navigating to Youtube and back on device with iOS 15.0.2/15.0/15.1 Tested devices: Bug is reproducible on: *iPhone 11 Pro Max | 15.0.2 *iPhone 13 | iOS 15.0 *iPhone 12 Pro Max | iOS 15.1 *iPhone XS | iOS 15.1 Bug is not reproducible on: *iPhone XS Max | iOS 14.6 *iPhone 13 | iOS 15.2 Beta 3 Scenario: Precondition: Active WebRTC call Steps: 1. Put browser in the background 2. Open Youtube app 3. Play a song 4. Put Youtube app in the background 5. Relaunch Safari Actual result: Safari freezes when navigating to Youtube and back to the active WebRTC call. The only way to stop this behaviour is by reloading the page. Expected result: Safari is usable Reproducibility: 80% 1819988 1 ap 2021-12-02 18:33:19 -0800 rdar://85998808 1820105 2 youennf 2021-12-03 04:58:25 -0800 Is it still happening in iOS 15.2 beta? 1820106 3 youennf 2021-12-03 04:59:03 -0800 Oh, I see you wrote it is no longer reproducing in iOS 15.2 beta 3 1820107 4 youennf 2021-12-03 05:00:56 -0800 Looking at logs, this is indeed an issue when disposing Audio units, which is supposed to be fixed in iOS 15.2 betas. Marking as configuration changed.