NAV 7.6 corp

We are running NAV 7.6 system console on a NT 4.0 box. Some of the users shown in the console are listed as “~E~V in ~F” instead of the user name. Sometimes it shows it that way and sometimes it shows it the correct way. I’ve searched Symantec for the answer and have never found anything. Has anyone ever seen this or known what it is?