I entered free text (Shift-x) into identify that a dynamic was to occur on the second time, so placed it below the staff and dynamic. It looked fine in Engrave and held in the full score. But in the parts, the text was moved back to over the staff, unlike what showed in Engrave
Select the text in Engrave mode and Edit→Propagate Properties. If you set “set local properties Globally” before you edit, then it will propagate to the parts.