My incoming calls hang up in the 15th sec with RTP time-out without being able to hear from the caller and the caller can't hear me

[wishwelloklu]

Describe the bug I am running my sip for both incoming and outgoing call. The outgoing works perfectly but with incoming calls. I don't get audio and the other party can hear me speak and then the call hangs up on the 15th sec with call ended with cause: Code: [408], Cause: RTP Timeout, Reason: RTP Timeout. I am running every call function including the ongoing call which works perfectly on a background thread using flutter_background_services package

Microphone usage icon is not visible for incoming calls but visible for outgoing calls.

Logs

I/FlutterWebRTCPlugin(16786): getUserMedia(audio): mandatory: [], optional: [googNoiseSuppression: true, googEchoCancellation: true, echoCancellation: true, googEchoCancellation2: true, googDAEchoCancellation: true] D/FlutterWebRTCPlugin(16786): MediaStream id: aba87cdd-7583-48bf-ac24-122170133dfc I/flutter (16786): [2024-09-30 09:55:09.414] Level.debug rtc_session.dart:448 ::: answer() I/flutter (16786): [2024-09-30 09:55:09.425] Level.debug dialog.dart:116 ::: dialog b7cffa09-05d4-41a4-9382-b03c223c35f4ltz7tz0sh4cb9c070f-da9f-4360-bd0e-b3f257e34832 changed to CONFIRMED state I/flutter (16786): trying to add null key I/flutter (16786): [2024-09-30 09:55:09.779] Level.debug rtc_session.dart:1616 ::: emit "peerconnection" I/flutter (16786): [2024-09-30 09:55:09.790] Level.debug rtc_session.dart:636 ::: emit "sdp" D/FlutterWebRTCPlugin(16786): onAddTrack I/flutter (16786): [2024-09-30 09:55:09.882] Level.debug rtc_session.dart:2929 ::: session connecting I/flutter (16786): [2024-09-30 09:55:09.884] Level.debug rtc_session.dart:2930 ::: emit "connecting" I/flutter (16786): [2024-09-30 09:55:09.913] Level.debug sip_ua_helper.dart:252 ::: call connecting I/flutter (16786): callState: CONNECTING I/flutter (16786): [2024-09-30 09:55:09.930] Level.debug rtc_session.dart:1623 ::: createLocalDescription() I/flutter (16786): callState: STREAM I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: initPlayout(sampleRate=48000, channels=1, bufferSizeFactor=1.0) I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: byteBuffer.capacity: 960 I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: minBufferSizeInBytes: 4232 I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: createAudioTrackBeforeOreo I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: nativeOutputSampleRate: 48000 I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: AudioTrack: session ID: 297, channels: 1, sample rate: 48000, max gain: 1.0 I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: AudioTrack: buffer size in frames: 2116 I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: AudioTrack: buffer capacity in frames: 2116 I/org.webrtc.Logging(16786): VolumeLogger: start@[name=worker_thread - 17209, id=140] I/org.webrtc.Logging(16786): VolumeLogger: audio mode is: MODE_IN_COMMUNICATION I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: startPlayout I/flutter (16786): callState: STREAM I/org.webrtc.Logging(16786): VolumeLogger: VOICE_CALL stream volume: 3 (max=5) I/org.webrtc.Logging(16786): WebRtcAudioTrackExternal: AudioTrackThread@[name=AudioTrackJavaThread, id=163]

To Reproduce Steps to reproduce the behavior:

1. Call from a different phone
2. Answer call from the app

Expected behavior I expected the to hear from the caller and the caller to hear from me but the call hangs up on 15th sec

System Infomation() Flutter SDK Version: Flutter 3.24.0, Dart 3.5.0 Target OS and Version: Host OS and Version: