How accurate is the unused objects filter in the object explorer?

[JanVC]

When opening the "Object Explorer" and choosing the filter "Unused objects", there are only 4 items displayed.

I know for a fact that at least one host object isn't used anywhere, as you can see in the individual "Where used" popup, but this host is not displayed in the "Unused objects" filter.

R80.30 MDS jumbo 217

SmartConsole build 36