Syslog not sending logs to graylog server

Hello, for quite some time now (few releases ago) IPF syslog is not sending logs to my GL server, have the settings configured on syslog setting page (udp 514) but nothing is flowing to the syslog server.

checking previous posts found this command to check if port 514 is showing use but returned nothing

tcpdump -XXnn port 514 -vv

tcpdump: listening on red0, link-type EN10MB (Ethernet), snapshot length 262144 bytes

0 packets captured
0 packets received by filter
0 packets dropped by kernel

GL is receiving packets from my other devices on the green and blue networks, any help to troubleshoot / fix this issue will be gratefully received.

Thank you.

I assume in Logs > Log Settings, you enabled syslog UDP to a green ip.

yes it is been enabled for long time