I have been using Kamailio as dispatcher but I have been facing a weird situation that when asterisk SendText command says that message was delivered successfully but webrtc sip client did not receive the message.

My deployment has Kamailio as registrar where sip users are registered and when they make any outgoing call, the call is proxied by RTPEngine and then dispatched to Asterisk boxes.

Asterisk boxes send some text to the client using SendText but the message is not received by the SIP client.

My config as follows: