[SR-Users] Advertise NAT IP address causing Multiple SIP INVITEs is that expected ?

Hi I am using advertise in the listen interface for our NATed setup within AWS.   Using following listen statement in kamailio: -   version: kamailio 5.5.1   listen=udp:10.0.1.4:5060 advertise 3X.1XX.1XX.2XX:5060   dispatcher.list 1 sip:10.0.4.23:5060 8 10 weight=11 #FreeSwitch 1   We are seeing that kamailio (10.0.1.4) is sending  two SIP INVITEs via dispatcher to FreeSwitch at 10.0.4.23 which seems strange or is it expected behaviour? (As seen below)   SIP INVITE Request: - WAN Address  >> Kamailio AWS NATed address        >> FreeSwitch 1                1X.2X.2X.2X     >>   3X.1XX.1XX.2XX                                                                               10.0.1.4     >> 10.0.4.23                                                                                 10.0.1.4     >> 10.0.4.23   Many thanks  Regards Muhammad Zaka