hi, I was testing the demo project that apple released about GroupActivity. Here is the link And when I run this demo on my iPhone12 iOS15 beta2, it came the error below in the runtime: dyld[12941]: Symbol not found: _$s15GroupActivities0A7SessionC8SessionsV8IteratorVyx__GScIAAMc  Referenced from: /private/var/containers/Bundle/Application/400F18B3-F1F2-47A8-B116-8F700D1E87DC/GroupWatching.app/GroupWatching  Expected in: /System/Library/Frameworks/GroupActivities.framework/GroupActivities Does anyone knows how to fix this? Thx

Sample Code for develop in safari to shareplay with others, one step is adopting Coordinator. Source: https://developer.apple.com/videos/play/wwdc2021/10189/ Here is the sample code: navigator.mediaSession.addEventListener(‘coordinatorchange’, coordinator =>{ if (coordinator) coordinator.join(); controls.inSessionIcon.style.hidden = !coordinator; }); But navigator.mediaSession have no API addEventListener. I think it should be navigator.mediaSession.coordinator.addEventListener Any one agree with me?

Does shareplay support a custom player (different play buttons, pause buttons etc.)? Does anyone have some sample code that does this?

I have seen a crash in Objective-C run time while pthread exits. I tried to reproduce it with Monetary 12.2 and same is not observed. following is the back trace 0  libobjc.A.dylib                   0x7ff8198ede7f objc_release + 31 1  libobjc.A.dylib                   0x7ff8198f241f AutoreleasePoolPage::releaseUntil(objc_object**) + 167 2  libobjc.A.dylib                   0x7ff8198ef3a0 objc_autoreleasePoolPop + 161 3  libobjc.A.dylib                   0x7ff8198f63c9 AutoreleasePoolPage::tls_dealloc(void*) + 91 4  libsystem_pthread.dylib           0x7ff819a5556c _pthread_tsd_cleanup + 487 5  libsystem_pthread.dylib           0x7ff819a57b80 _pthread_exit + 70 6  libsystem_pthread.dylib           0x7ff819a574ff _pthread_start + 136 7  libsystem_pthread.dylib           0x7ff819a5300f thread_start + 15