Null/blank sysName value causes null/blank node label

When the snmp node name returns an empty value, the same name (null/empty/space?) is used as the initial node name. I can't see that on the full node list, although I think its on there. If I know the IP address I can do a search for it I can get to the node page and rename it from there.

Now why my nodes are responding with a name that bad is a long story. Usually they are "boxes" (a fiber tranciever) not real servers, but have some SNMP. This specific instance is a server that came preconfigured as a package deal, and I have less control over that than I would like.

Would it be possible to check for non-whitespace characters before trying to use a SNMP hostname?