NIS 19.5.0.145 - Security Map not remembering names of wirless devices.

Just got a  new device and my Norton Security Map on my main desktop at home keeps blanking out on the name of new devices on my network.  Sometimes it appears with the name I gave it, other times it jsut shows NEW.  And the MAC addresses adn IP's are still the same on the new device.  Any thoughts?

 

Rich