It has been operational for about 18 hours and quickly indicated that IPv6 connectivity was functional, but it has only momentarily indicated IPv4 connectivity was established. I can see IPv4 ICMP and UDP traffic originating from the probe passing through my opnsense router on the IPv4 WAN interface so I know IPv4 traffic is flowing. I also see the correct IPv4 DHCP lease info for my LAN on the probe's network status page. 

Probe address discovery does not show a valid IPv4 connection address or IP Echo Service listed, only the Local IP of my probe. I've tried power cycling the probe but it doesn't seem to impact this issue. 

Are there any other troubleshooting steps I should try?