After saving a form with a new name, any data entered in the fields that are located on the master page is lost.
By default, master page fields are temporary and have their binding set to none. They are reset when a new layout occurs. This means that when you add a new subform or save the form under a new name, any data entered in the master page fields is lost.
You can change the binding for master page fields to normal or global. The field values are retained when the form is saved.