When does the missing images reason box disappears at expense report level?

Summary:

We have a set-up that receipts with missing imaged receipts will be audited. The preparer or submitter attached a receipt (not imaged but a pdf or word document at expense type level. The missing imaged receipt box is showing at expense report header level. How can we make this disappear?

A missing images reason box appears in the header of the expense report when we save it even though we have attached a receipt to the expense. The box appears as soon as we save an expense item into the report or save the report if we started the report by selecting an expense item..