Handling closure of RTCPeerConnection

[lostmsu]

My current setup is:

1. Create RTCPeerConnection with 1 media track and 1 data channel
2. Exchange offers and ICE candidates
3. Listen to RTCPeerConnection.OnClosed, cleanup, and start again

The remote end is a browser.

The problem is that sometimes when I reload the page in the browser, OnClosed never gets fired. However, onconnectionstatechange is fired first with disconnected state, and then with failed state.

Am I listening to the wrong event? I am struggling to understand lifecycle of the parts.

I even have this:

this.Control = this.RTC.createDataChannel("control").Result;
this.Control.onclose += this.RTC.close;

And the channel's onclose event does not appear to be firing either.

This is the log after the browser reloads page:

Warning: SIPSorcery.Net.SctpAssociation: SCTP packet ABORT chunk received from remote party, reason .
Debug: sipsorcery: DTLS server received close notification: warning(1), close_notify(0).
Debug: sipsorcery: SCTP closing transport as a result of DTLS close notification.
Debug: sipsorcery: DTLS server raised close notify: warning(1), close_notify(0).
Debug: sipsorcery: SCTP transport for create data channel request changed to state Closed.
Warning: sipsorcery: ICE RTP channel disconnected after 12s udp:[::]:52908 (host)->udp:192.168.0.18:53492 (prflx).
Debug: MyApp: connection state changed: disconnected
Warning: sipsorcery: ICE RTP channel failed after 18s udp:[::]:52908 (host)->udp:192.168.0.18:53492 (prflx).
Debug: MyApp: connection state changed: failed
Warning: sipsorcery: RTCP session for local ssrc 1844639367 has not had any activity for over 30 seconds.