iceRestart on createoffer not working

[slootmaekersdirk]

Hello,

I'm implementing iceRestart when the connection of onIceStateChange() goes to disconnect/failed.
In our case this can happen, while on the phone, we switch from ethernet to wifi, or in general switch IP addresses.

So I need to implement iceRestart to re-negotiate the ice candidates.
I can force a new CreateOffer with iceRestart:true and I get new icecandidates.
at the end a new 'invite' is send to the websocket, notifying the webrtc signalling server of Amazon Connect.

The problem is that it is not reacting well to sending an 'invite' again on a session that is already ongoing.

I receive a 'BAD_REQUEST' from the signalling websocket :

{"connectionId":"99b1dc8c-01c4-44aa-xxxxxxx","jsonRpcMsg":{"id":"ea012284-7d85-4c14-969f-xxxxxx","jsonrpc":"2.0","error":{"code":400,"data":{"errorCause":"BAD_REQUEST"},"message":"Error"}}}"

My questions, is it possible to have an iceRestart with this library, and am I missing something why it is not working?
For completeness the initial createOffer flow and and the restartIce Flow are exactly the same. instead of using an 'invite' should i use another method in this case so amazon connect signaling server does not react with a BAD_REQUEST?

thanks for the assistance,

[slootmaekersdirk]

Here is the change of the onicestatechange() what I have implemented

onIceStateChange(evt) {
if (evt.currentTarget.iceConnectionState == 'disconnected') {
this.logger.info('Lost ICE connection');
this._rtcSession._sessionReport.iceConnectionsLost += 1;
setTimeout(()=>this.transit(new CreateOfferState2(this._rtcSession)),4000);
}
if (evt.currentTarget.iceConnectionState == 'connected') {
this.logger.info('ICE connected');
this._rtcSession._sessionReport.iceConnectionsLost = 0;
}

}

And here is the createOfferState2, with the ice restart parameter

export class CreateOfferState2 extends RTCSessionState {
onEnter() {
var self = this;
var stream = self._rtcSession._localStream;
self._rtcSession._pc.addStream(stream);
self._rtcSession._onLocalStreamAdded(self._rtcSession, stream);
self._rtcSession._pc.createOffer({iceRestart:true,offerToReceiveAudio:true,offerToReceiveVideo:false}).then(rtcSessionDescription => {
self._rtcSession._localSessionDescription = rtcSessionDescription;
self._rtcSession._sessionReport.createOfferFailure = false;
self.transit(new SetLocalSessionDescriptionState(self._rtcSession));
}).catch(e => {
self.logger.error('CreateOffer2 failed', e);
self._rtcSession._sessionReport.createOfferFailure = true;
self.transit(new FailedState(self._rtcSession, RTC_ERRORS.CREATE_OFFER_FAILURE));
});
}
get name() {
return "CreateOfferState2";
}
}