I found on init.method line 185, the selection of these conditions cause the value "top position" in the title can not be changed if empty lblDescription
*--------------------------------------------
* As only the Refresh() event is
* automatically triggered at form start, we
* have to trigger the RefreshDescription()
* event ourselves.
*--------------------------------------------
IF NOT EMPTY(EVALUATE( "m.Thisform." + m.This.cDescriptionProperty ))
m.This.RefreshDescription()
ENDIF
*IF NOT EMPTY(EVALUATE( "m.Thisform." + m.This.cDescriptionProperty ))
m.This.RefreshDescription()
*ENDIF