[8.160][NOTABUG][CLOSED] Users showing as IP's under reporting

Hi All

When I go to Reporting->Web Security then select "Web usage report" and "user" report , under the user column there are no usernames listed, only IP's

I have DNS (forward/reverse) defined for the IP/users

PS credit to @ jterribili  (https://community.sophos.com/products/unified-threat-management/astaroorg/f/53/t/33174)

Thanks