Jason Dillon noticed that on the Security>Anonymous page the Realm list dropdown initially shows no items in it unless you go to the Security>Realms page first.
This can be reproed both by logging in directly to http://localhost:8081/#admin/security/anonymous or by logging in normally and navigating to Security>Anonymous before going to Security>Realms. Then click on the realm dropdown.
Both of us recall seeing this or something akin before but could not find a related ticket. I suspect this affects older versions of NX3 because of this but did not back check at this time. This does not affect NX2 because the setup is different.
Testing done with debug off.