Describe the bug
In a public network environment, an exception occurs when the Bye sent by the peer end disappears

Expected behavior
flutter: [2022-09-02 15:33:13.211] Level.debug websocket_interface.dart:173 ::: Received WebSocket message
flutter: [2022-09-02 15:33:13.219] Level.debug transport.dart:313 ::: received text message:
BYE sip:16505957@4y5xzp1644fi.invalid;transport=wss;ob SIP/2.0
Via: SIP/2.0/WSS 1.190.195.26:39468;rport;branch=z9hG4bK78v8Z687UFpBN
Max-Forwards: 70
From: sip:18745838198@dev.haoxin.cn:7443;tag=H6gNy7mDH294Q
To: "342-263" sip:342-263@dev.haoxin.cn:7443;tag=99q791981b
Call-ID: qgfcm9b7cbkggldexmc3
CSeq: 56498204 BYE
User-Agent: ddtswitch
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
Supported: timer, path, replaces
Reason: Q.850;cause=31
Content-Length: 0
flutter: input => SIP/2.0/WSS 1.190.195.26:39468;rport;branch=z9hG4bK78v8Z687UFpBN, rule => Via
flutter: Format exception: Expected ALPHA but found '2'
[VERBOSE-2:ui_dart_state.cc(198)] Unhandled Exception: FormatException
#0 Grammar.parse
#1 IncomingMessage.parseHeader
#2 parseHeader
#3 parseMessage
#4 UA.onTransportData
#5 Transport._onData
#6 WebSocketInterface._onMessage
#7 WebSocketInterface.connect.
#8 WebSocketImpl.connect.
#9 _rootRunUnary (dart:async/zone.dart:1434:47)
#10 _CustomZone.runUnary (dart:async/zone.dart:1335:19)
#11 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7)
#12 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)
#13 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#14 _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:774:19)
#15 _StreamController._add (dart:async/stream_controller.dart:648:7)
#16 _StreamController.add (dart:async/stream_controller.dart:596:5)
#17 new _WebSocketImpl._fromSocket. (dart:_http/websocket_impl.dart:1144:21)
#18 _rootRunUnary (dart:async/zone.dart:1434:47)
#19 _CustomZone.runUnary (dart:async/zone.dart:1335:19)
#20 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7)
#21 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)
#22 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#23 _SinkTransformerStreamSubscription._add (dart:async/stream_transformers.dart:63:11)
#24 _EventSinkWrapper.add (dart:async/stream_transformers.dart:13:11)
#25 _WebSocketProtocolTransformer._messageFrameEnd (dart:_http/websocket_impl.dart:332:23)
#26 _WebSocketProtocolTransformer.add (dart:_http/websocket_impl.dart:226:46)
#27 _SinkTransformerStreamSubscription._handleData (dart:async/stream_transformers.dart:111:24)
#28 _rootRunUnary (dart:async/zone.dart:1434:47)
#29 _CustomZone.runUnary (dart:async/zone.dart:1335:19)
#30 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7)
#31 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)
#32 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#33 _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:774:19)
#34 _StreamController._add (dart:async/stream_controller.dart:648:7)
#35 _StreamController.add (dart:async/stream_controller.dart:596:5)
#36 _Socket._onData (dart:io-patch/socket_patch.dart:2314:41)
#37 _rootRunUnary (dart:async/zone.dart:1434:47)
#38 _CustomZone.runUnary (dart:async/zone.dart:1335:19)
#39 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7)
#40 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:341:11)
#41 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:271:7)
#42 _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:774:19)
#43 _StreamController._add (dart:async/stream_controller.dart:648:7)
#44 _StreamController.add (dart:async/stream_controller.dart:596:5)
#45 _RawSecureSocket._sendReadEvent (dart:io/secure_socket.dart:1107:19)
#46 _rootRun (dart:async/zone.dart:1418:47)
#47 _CustomZone.run (dart:async/zone.dart:1328:19)
#48 _CustomZone.runGuarded (dart:async/zone.dart:1236:7)
#49 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1276:23)
#50 _rootRun (dart:async/zone.dart:1426:13)
#51 _CustomZone.run (dart:async/zone.dart:1328:19)
#52 _CustomZone.bindCallback. (dart:async/zone.dart:1260:23)
#53 Timer._createTimer. (dart:async-patch/timer_patch.dart:18:15)
#54 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19)
#55 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
#56 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)
flutter: [2022-09-02 15:33:18.791] Level.debug rtc_session.dart:1150 ::: renegotiate()
flutter: [2022-09-02 15:33:18.811] Level.debug rtc_session.dart:2470 ::: sendReinvite()
flutter: [2022-09-02 15:33:18.815] Level.debug rtc_session.dart:1644 ::: createLocalDescription()
flutter: [2022-09-02 15:33:18.826] Level.debug rtc_session.dart:1732 ::: emit "sdp"
flutter: [2022-09-02 15:33:18.831] Level.debug rtc_session.dart:2541 ::: emit "sdp"
flutter: [2022-09-02 15:33:18.834] Level.debug rtc_session.dart:1249 ::: sendRequest()
flutter: [2022-09-02 15:33:18.837] Level.debug transport.dart:167 ::: send()

System Infomation()
Flutter SDK Version:3.0.4
Target OS and Version:0.5.2
Host OS and Version:iOS15.4