Change Order Reapproval Rules in Release 12

When using the Change Order form works properly when updating the distribution list % but when putting in a % value in the Line Quantity or line amount %, PO still goes into reapproval.
why?

When using the Change Order form works properly when updating the distribution list % but when putting in a % value in the Line Quantity or line amount %, PO still goes into reapproval.
why?

Oracle Applications Fusion Cloud - Inventory

Oracle Cloud/Fusion Procurement training will help you develop the fundamental skills required to set up and use the Procurement module. This training covers all the tasks, setups, forms and reports used in Procurement and related modules