GCO heartbeat has status Exited Icmp unknown

After moving server to secondary site, replication has restarted and working - good - except the Icmp status between gco  cluster: status  Exited Icmp unknown

Please Note that the distance between the 2 sites is 500km, the bandwidth is about 1.5mbs

and the following tunig parameters:

heartbeat Icmp (
  ...
    AYAInterval @vcs-remote = 0
    InitTimeout @vcs-remote = 0
    StartTimeout @vcs-remote = 0
    CleanTimeout @vcs-remote = 0
    StopTimeout @vcs-remote = 0
    AYATimeout @vcs-remote = 0
    AYARetryLimit @vcs-remote = 0
    Arguments @vcs-remote = { "x.x.x.169", "" }

please any fedback regarding   hahb -display
Icmp         State          UNKNOWN

Regards