Stop default value from refreshing

I have an editable Names field "OriginatorPM"on my form with the default value set to @Name([CN];@UserName). Every time a document is opened and refreshed, the current user name is entered in the field. I thought the default value only populated when a document is created. Can someone tell me why the field is refreshing on F9? Thank you.

Subject: Stop default value from refreshing

Sounds like there is something in the inputTranslation event that is reseting this

Subject: Stop default value from refreshing

It populates if it is blank. To fix this:

@If(@IsNew;@Name([CN];@UserName);“”);

or

@If(@IsNew;@Name([CN];@UserName);OriginatorPM);