livekit_server     | {"level":"info","ts":1611711120.595618,"caller":"rtc/mediatrack.go:275","msg":"keyframe required, sending PLI","srcParticipant":"PA_iUw8knfEK3H7jpaQRpRMnV"}
livekit_server     | {"level":"error","ts":1611711123.828131,"caller":"runtime/chan.go:275","msg":"recovered panic","error":"send on closed channel","stacktrace":"runtime.chansend\n\t/usr/local/go/src/runtime/chan.go:275\nruntime.chansend1\n\t/usr/local/go/src/runtime/chan.go:143\<http://ngithub.com/livekit/livekit-server/pkg/routing.(*MessageChannel).WriteMessage\n\t/workspace/pkg/routing/messagechannel.go:23\ngithub.com/livekit/livekit-server/pkg/rtc.(*ParticipantImpl).SendParticipantUpdate\n\t/workspace/pkg/rtc/participant.go:379\ngithub.com/livekit/livekit-server/pkg/rtc.(*Room).broadcastParticipantState\n\t/workspace/pkg/rtc/room.go:202\ngithub.com/livekit/livekit-server/pkg/rtc.(*Room).Join.func1\n\t/workspace/pkg/rtc/room.go:65\ngithub.com/livekit/livekit-server/pkg/rtc.(*ParticipantImpl).updateState.func1\n\t/workspace/pkg/rtc/participant.go:485%22}|ngithub.com/livekit/livekit-server/pkg/routing.(*MessageChannel).WriteMessage\n\t/workspace/pkg/routing/messagechannel.go:23\ngithub.com/livekit/livekit-server/pkg/rtc.(*ParticipantImpl).SendParticipantUpdate\n\t/workspace/pkg/rtc/participant.go:379\ngithub.com/livekit/livekit-server/pkg/rtc.(*Room).broadcastParticipantState\n\t/workspace/pkg/rtc/room.go:202\ngithub.com/livekit/livekit-server/pkg/rtc.(*Room).Join.func1\n\t/workspace/pkg/rtc/room.go:65\ngithub.com/livekit/livekit-server/pkg/rtc.(*ParticipantImpl).updateState.func1\n\t/workspace/pkg/rtc/participant.go:485"}>