This is correct. You cannot use the first 3 letters of that word. Why do you think it would be acceptable now as your name when it was being censored before?
English
-
Before the change in beyond light there was no issue. That's when it changed my name to Guardian. Never received anything say that it wasn't allowed or caused an issue before.
-
Because before the “Bungie name” system came into place, Bungie relied on the platform naming system. Now, they filter what can/cant be displayed as our name.