We have an NCM device family set to search for a particular device type and set to update in real-time. After an NCM firmware update, a reconfiguration is triggered. The reconfiguration moves the models out of the Global Collection and the Device Family. If the device family and/or GC is manually updated, the device moves right back into the collection.
The device does not support the standard IPAddress table.
Spectrum 10.3.x, 10.4.0
This is resolved in 10.4.1 and above. If a device does not support the standard IPAddress table, it will not be removed from the Global Collection or Device Family.