This article helps to fix issue when both LON and LAT are blank on Northstar UI.

However, per downloaded metadata contains all coordinates,.

Below steps help to fix the issue-

Steps :: 

1. Do a latest export -> CSV for the metadata download
2. Check and confirm LAT/LON coordinates value are present.
3. If all good, proceed with same exported file ReImport in the Layout *(Import From)
4. Post import > confirm if the NetInfo table refreshes the display and LAT/LON values are visible in the GUI.