[atlas] New V5 Probe with IPv4 Discovery issues

I received a shiny new V5 probe via post on Saturday and got it up and
running yesterday on my dual-stack network.  The probe in question is:
https://atlas.ripe.net/probes/62490/

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?
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