[atlas] Probe not flagged as "IPv4 works"

Hi, I have 3 probes in different networks. This one probe is not selected for tests when I do a test on multiple probes that I select op probe ID or ASN. This is the troubling probe: https://atlas.ripe.net/probes/24645/ It is connected via a 4G LTE router. The router is up and everything else works. I could just reboot the modem and the probe but I'm wondering why it fails to get flagged with "IPv4 works". The "built in" test seem to work fine. What could be the issue? Is there something I could do to debug? Or just reboot and forget about it? Thanks, Dave