[Xymon] Nothing showing except CONN for one host

I have a single host that won’t show anything but the CONN column on the display page for it. It is running a client, but nothing is being populated on the server end. I have many, many other clients installed, some in this same location and on the same network. Normally this might be a short name vs FQDN name in bb-hosts, but I have both the short and fqdn in the file currently. I am running an older version of Xymon 4.2 still, but again no issue with other hosts. Any other idea what might be causing the DISPLAY not to be populated?

Thanks