[SR-Users] Nat Detect does not work with GS Phones

I have found an issue detecting NAT of GS 1.4.23 Phones when using Stun on this phones Usual nat_uac_test with numbers 19 and 3 does not seems to detect is behind nat so NATMANAGE is not called Here its some trace. ANy clue how to handle this phones if they activate STUN for example U 80.26.x.x:52768 -> 192.168.0.170:8002 INVITE sip:2@x.x.x.x:8002 SIP/2.0. Via: SIP/2.0/UDP 80.26.x.x:52768;branch=z9hG4bK358742535;rport. From: "Anonymous" <sip:anonymous@anonymous.invalid>;tag=1478444456. To: <sip:2@x.x.x.x:8002>. Call-ID: 244257786-52768-56(a)IA.CG.BIE.BCH. CSeq: 550 INVITE. Contact: "Anonymous" <sip:212@80.26.x.x:52768>. X-Grandstream-PBX: true. Max-Forwards: 70. User-Agent: Grandstream GXP2140 1.0.4.23. Privacy: id. P-Preferred-Identity: <sip:212@x.x.x.x:8002>. Supported: replaces, path, timer. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE. Content-Type: application/sdp. Accept: application/sdp, application/dtmf-relay. Content-Length: 335. . v=0. o=212 8000 8000 IN IP4 80.26.x.x. s=SIP Call. c=IN IP4 80.26.x.x. t=0 0. m=audio 55422 RTP/AVP 0 8 18 9 2 101. a=sendrecv. a=rtpmap:0 PCMU/8000. a=ptime:20. a=rtpmap:8 PCMA/8000. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:9 G722/8000. a=rtpmap:2 G726-32/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. # Caller NAT detection route route[NATDETECT] { #!ifdef WITH_NAT force_rport(); if (nat_uac_test("19)) { if (is_method("REGISTER")) { fix_nated_register(); } else { fix_nated_contact(); } setflag(FLT_NATS); } #!endif return; }