[SR-Users] CANCEL relayed to broadcast 255.255.255.255

Hi gents, Got this weird "problem", where CANCEL request is relayed to both the right destination as well as the 255.255.255.255 broadcast address!? I have no such logic in my script, that's for sure. I doesn't do anything harmful (as far as I can tell), but I'm just curious why it's doing that. Any ideas? version: kamailio 5.3.4 *SIP Trace:* U 2020/05/26 08:40:10.941722 PBXIP:5060 -> KAMAILIO_IP:5060 CANCEL sip:2383@DOWNSTREAM_IP:10533;transport=TLS SIP/2.0 Via: SIP/2.0/UDP PBXIP:5060;branch=z9hG4bK450689d6 Max-Forwards: 69 From: "some callerid" <sip:18001111111@mypbx.mydomain.com>;tag=as4d223616 To: <sip:2383@DOWNSTREAM_IP:10533;transport=TLS> Call-ID: 1511475b69f6379b08f04d110f534da1(a)mypbx.mydomain.com CSeq: 102 CANCEL User-Agent: B2B Content-Length: 0 U 2020/05/26 08:40:10.941799 KAMAILIO_IP:5060 -> 255.255.255.255:5060 CANCEL sip:2383@DOWNSTREAM_IP:10533;transport=TLS SIP/2.0 Via: SIP/2.0/UDP PBXIP:5060;branch=z9hG4bK450689d6 Max-Forwards: 69 From: "some callerid" <sip:18001111111@mypbx.mydomain.com>;tag=as4d223616 To: <sip:2383@DOWNSTREAM_IP:10533;transport=TLS> Call-ID: 1511475b69f6379b08f04d110f534da1(a)mypbx.mydomain.com CSeq: 102 CANCEL User-Agent: B2B Content-Length: 0 T 2020/05/26 08:40:10.941899 KAMAILIO_IP:5061 -> DOWNSTREAM_IP:10533 CANCEL sip:2383@DOWNSTREAM_IP:10533;transport=TLS SIP/2.0 Via: SIP/2.0/TLS proxy.mydomain.com:5061;branch=z9hG4bK3cbb.4c6a526982fa1fb93ca1ba73afd8484f.0 Max-Forwards: 69 From: "some callerid" <sip:18001111111@mypbx.mydomain.com>;tag=as4d223616 To: <sip:2383@DOWNSTREAM_IP:10533;transport=TLS> Call-ID: 1511475b69f6379b08f04d110f534da1(a)mypbx.mydomain.com CSeq: 102 CANCEL Content-Length: 0 U 2020/05/26 08:40:10.941935 KAMAILIO_IP:5060 -> PBXIP:5060 SIP/2.0 200 canceling Via: SIP/2.0/UDP PBXIP:5060;branch=z9hG4bK450689d6 From: "some callerid" <sip:18001111111@mypbx.mydomain.com>;tag=as4d223616 To: <sip:2383@DOWNSTREAM_IP :10533;transport=TLS>;tag=a6a1c5f60faecf035a1ae5b6e96e979a-612a1516 Call-ID: 1511475b69f6379b08f04d110f534da1(a)mypbx.mydomain.com CSeq: 102 CANCEL Server: Edge Content-Length: 0 Thanks, --Sergiu