3823849 - How can an already submitted Expense Report be sent to a new default approver after they have been changed?

When you open the Expense Report you can still see the name of the previous default Expense Approver in the Approval Flow, even though they have already been changed. How can the report be sent to the new default approver?

An employee has already submitted their Expense Report and the default Expense Approver has been changed afterwards. The Expense Report has to be sent to the new default Expense Approver. , KBA , CON-EXP-ADM-WFL-WL , Workflow , Problem