DTLS transport crash on message :retransmit

[sgfn]

[debug] Started DTLSTransport with role passive
[debug] Received binding request from: {{192, 168, 82, 181}, 53774}, on: {{192, 168, 82, 181}, 50576}
[debug] Role conflict, switching our role to controlling. Recomputing pairs priority.
Our tiebreaker: 11552852546584535244
Peer's tiebreaker: 5660097003257695623
[debug] Changing PeerConnection signaling state state: have_local_offer -> stable
[debug] Peer 402e5d6080 added remote video track 74319142476835193247643223536
[debug] Peer 402e5d6080 added remote audio track 19303035145960822483153125218
[debug] Ignoring unknown message: {:ex_webrtc, #PID<0.7470.0>, {:signaling_state_change, :stable}}
[debug] HANDLED sdp_answer INCOMING ON peer:signalling (NexusWeb.PeerChannel) in 459µs
  Parameters: %{"body" => "v=0\r\no=- 8985628995966016173 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE 0 1\r\na=extmap-allow-mixed\r\na=msid-semantic: WMS\r\nm=video 9 UDP/TLS/RTP/SAVPF 96 97\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:SN7i\r\na=ice-pwd:ScfV+V3HJLig1fQJTgl+zrXT\r\na=ice-options:trickle\r\na=fingerprint:sha-256 71:F1:0E:C0:4A:BF:A7:F4:D9:CE:CE:5A:21:C5:7C:85:10:09:4F:6E:10:EE:77:F2:2B:BC:F1:13:AA:5A:7A:63\r\na=setup:active\r\na=mid:0\r\na=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid\r\na=extmap:2 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id\r\na=extmap:4 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id\r\na=sendonly\r\na=msid:- aced2659-9575-4f85-b052-3c470b1595f8\r\na=rtcp-mux\r\na=rtpmap:96 H264/90000\r\na=rtcp-fb:96 transport-cc\r\na=rtcp-fb:96 ccm fir\r\na=rtcp-fb:96 nack\r\na=rtcp-fb:96 nack pli\r\na=fmtp:96 level-asymmetry-allowed=1;packetization-mode=0;profile-level-id=42e01f\r\na=rtpmap:97 rtx/90000\r\na=fmtp:97 apt=96\r\na=ssrc-group:FID 3920356045 4190523872\r\na=ssrc:3920356045 cname:NEEIfSbcz0V7SnQX\r\na=ssrc:4190523872 cname:NEEIfSbcz0V7SnQX\r\nm=audio 9 UDP/TLS/RTP/SAVPF 111\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:SN7i\r\na=ice-pwd:ScfV+V3HJLig1fQJTgl+zrXT\r\na=ice-options:trickle\r\na=fingerprint:sha-256 71:F1:0E:C0:4A:BF:A7:F4:D9:CE:CE:5A:21:C5:7C:85:10:09:4F:6E:10:EE:77:F2:2B:BC:F1:13:AA:5A:7A:63\r\na=setup:active\r\na=mid:1\r\na=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid\r\na=sendonly\r\na=msid:- 05f68402-8615-4e57-8dd4-abc9545ccbaf\r\na=rtcp-mux\r\na=rtpmap:111 opus/48000/2\r\na=rtcp-fb:111 transport-cc\r\na=fmtp:111 minptime=10;useinbandfec=1\r\na=ssrc:4117173597 cname:NEEIfSbcz0V7SnQX\r\n"}
[debug] HANDLED ice_candidate INCOMING ON peer:signalling (NexusWeb.PeerChannel) in 20µs
  Parameters: %{"body" => "{\"candidate\":\"candidate:1183350890 1 udp 2122260223 192.168.82.181 53774 typ host generation 0 ufrag SN7i network-id 1 network-cost 10\",\"sdpMid\":\"0\",\"sdpMLineIndex\":0,\"usernameFragment\":\"SN7i\"}"}
[debug] Adding new remote prflx candidate: %ExICE.Candidate{id: 33936565545562072957248198337, type: :prflx, address: {192, 168, 82, 181}, port: 53774, foundation: 3775828998, priority: 1862270975, transport: :udp, base_address: nil, base_port: nil}
[debug] Adding new candidate pair: %ExICE.Priv.CandidatePair{id: 75842787568691901740835553941, local_cand_id: 2337241859271583734996835597, remote_cand_id: 33936565545562072957248198337, priority: 7998392938176446463, nominate?: false, nominated?: false, state: :waiting, valid?: false, succeeded_pair_id: nil, discovered_pair_id: nil, keepalive_timer: nil, last_seen: -576457116752}
[debug] Connection state change: new -> checking
[debug] Setting remote credentials: "SN7i":"ScfV+V3HJLig1fQJTgl+zrXT"
[debug] Unmarshaling remote candidate: 1183350890 1 udp 2122260223 192.168.82.181 53774 typ host generation 0 ufrag SN7i network-id 1 network-cost 10
[debug] Changing PeerConnection state: new -> connecting
[debug] Ignoring unknown message: {:ex_webrtc, #PID<0.7470.0>, {:connection_state_change, :connecting}}
[debug] Ignoring unknown message: {:ex_webrtc, #PID<0.7470.0>, {:ice_connection_state_change, :checking}}
[debug] Successfully unmarshaled candidate.
Raw candidate: 1183350890 1 udp 2122260223 192.168.82.181 53774 typ host generation 0 ufrag SN7i network-id 1 network-cost 10.
Unmarshaled candidate: %ExICE.Candidate{id: 31923284033284547067393789138, type: :host, address: {192, 168, 82, 181}, port: 53774, foundation: 1572136343, priority: 2122260223, transport: :udp, base_address: nil, base_port: nil}

[debug] New remote candidate: %ExICE.Candidate{id: 31923284033284547067393789138, type: :host, address: {192, 168, 82, 181}, port: 53774, foundation: 1572136343, priority: 2122260223, transport: :udp, base_address: nil, base_port: nil}
[debug] Duplicated remote candidate. Ignoring.
Candidate: %ExICE.Candidate{id: 31923284033284547067393789138, type: :host, address: {192, 168, 82, 181}, port: 53774, foundation: 1572136343, priority: 2122260223, transport: :udp, base_address: nil, base_port: nil}
[debug] Generated local DTLS packets but ICE is not in the connected state yet.
We will send those packets once ICE is ready.

[debug] Changing DTLS state: new -> connecting
[debug] Received gathering transaction response from: {{1, 2, 3, 4}, 19302}, on: {{192, 168, 82, 181}, 50576}
[debug] New srflx candidate: %ExICE.Priv.Candidate.Srflx{base: #ExICE.Priv.CandidateBase<id: 5449183973417524052165273937, address: {5, 6, 7, 8}, foundation: 3995115028, port: 50576, priority: 1694498815, transport: :udp, transport_module: ExICE.Priv.Transport.UDP, type: :srflx, base_address: {192, 168, 82, 181}, base_port: 50576, ...>}
[debug] Gathering state change: gathering -> complete
[debug] Ignoring unknown message: {:ex_webrtc, #PID<0.7470.0>, {:ice_gathering_state_change, :complete}}
[debug] Stopping DTLSTransport with reason: {{:case_clause, {:retransmit, <<22, 254, 253, 0, 0, 0, 0, 0, 0, 0, 9, 0, 82, 2, 0, 0, 70, 0, 0, 0, 0, 0, 0, 0, 70, 254, 253, 29, 40, 178, 102, 78, 242, 174, 177, 70, 161, 182, 240, 195, 7, 32, 106, 149, 165, ...>>, 1999}}, [{ExWebRTC.DTLSTransport, :handle_info, 2, [file: ~c"lib/ex_webrtc/dtls_transport.ex", line: 261]}, {:gen_server, :try_handle_info, 3, [file: ~c"gen_server.erl", line: 1095]}, {:gen_server, :handle_msg, 6, [file: ~c"gen_server.erl", line: 1183]}, {:proc_lib, :init_p_do_apply, 3, [file: ~c"proc_lib.erl", line: 241]}]}
[error] GenServer #PID<0.7378.0> terminating
** (CaseClauseError) no case clause matching: {:retransmit, <<22, 254, 253, 0, 0, 0, 0, 0, 0, 0, 9, 0, 82, 2, 0, 0, 70, 0, 0, 0, 0, 0, 0, 0, 70, 254, 253, 29, 40, 178, 102, 78, 242, 174, 177, 70, 161, 182, 240, 195, 7, 32, 106, 149, 165, 36, 51, 40, ...>>, 1999}
    (ex_webrtc 0.3.0) lib/ex_webrtc/dtls_transport.ex:261: ExWebRTC.DTLSTransport.handle_info/2
    (stdlib 5.2.3) gen_server.erl:1095: :gen_server.try_handle_info/3
    (stdlib 5.2.3) gen_server.erl:1183: :gen_server.handle_msg/6
    (stdlib 5.2.3) proc_lib.erl:241: :proc_lib.init_p_do_apply/3
Last message: :dtls_timeout
State: %{owner: #PID<0.7376.0>, mode: :passive, cert: <<48, 130, 2, 213, 48, 130, 1, 189, 2, 4, 9, 212, 24, 12, 48, 13, 6, 9, 42, 134, 72, 134, 247, 13, 1, 1, 5, 5, 0, 48, 47, 49, 11, 48, 9, 6, 3, 85, 4, 6, 19, 2, 80, 76, 49, 15, 48, ...>>, fingerprint: <<76, 244, 167, 123, 30, 85, 54, 183, 118, 95, 135, 205, 0, 12, 26, 243, 172, 56, 154, 141, 36, 72, 14, 60, 147, 202, 1, 6, 52, 169, 210, 97>>, ice_transport: ExWebRTC.DefaultICETransport, ice_pid: #PID<0.7377.0>, dtls_state: :connecting, peer_fingerprint: "DC:6B:CD:42:AF:D2:69:3D:6F:1F:2E:98:2E:35:C1:DE:4E:0F:1C:6E:FB:9A:6C:EC:F2:0C:EA:F5:82:6E:48:CF", dtls: #Reference<0.3594876167.946733059.134071>, pkey: <<48, 130, 4, 163, 2, 1, 0, 2, 130, 1, 1, 0, 198, 117, 4, 140, 245, 128, 59, 136, 183, 135, 247, 32, 25, 171, 163, 202, 115, 209, 154, 132, 61, 67, 147, 249, 120, 170, 205, 243, ...>>, buffered_remote_packets: nil, ice_connected: false, buffered_local_packets: <<22, 254, 253, 0, 0, 0, 0, 0, 0, 0, 0, 0, 82, 2, 0, 0, 70, 0, 0, 0, 0, 0, 0, 0, 70, 254, 253, 29, 40, 178, 102, 78, 242, 174, 177, 70, 161, ...>>, base64_cert: "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", remote_fingerprint: nil, remote_base64_cert: nil, out_srtp: {ExLibSRTP, #Reference<0.3594876167.945946629.80851>}, in_srtp: {ExLibSRTP, #Reference<0.3594876167.945946629.80850>}, remote_cert: nil}
[info] Peer 349b9691a9 down with reason {{:case_clause, {:retransmit, <<22, 254, 253, 0, 0, 0, 0, 0, 0, 0, 9, 0, 82, 2, 0, 0, 70, 0, 0, 0, 0, 0, 0, 0, 70, 254, 253, 29, 40, 178, 102, 78, 242, 174, 177, 70, 161, 182, 240, 195, 7, 32, 106, 149, 165, ...>>, 1999}}, [{ExWebRTC.DTLSTransport, :handle_info, 2, [file: ~c"lib/ex_webrtc/dtls_transport.ex", line: 261]}, {:gen_server, :try_handle_info, 3, [file: ~c"gen_server.erl", line: 1095]}, {:gen_server, :handle_msg, 6, [file: ~c"gen_server.erl", line: 1183]}, {:proc_lib, :init_p_do_apply, 3, [file: ~c"proc_lib.erl", line: 241]}]}