The system sets the default location of a Special Purchase Order (PO) similar with its originating Special Sales Order (SO) if locations on both records are set in the line item level.
To resolve, customize the Special Order (PO) to display the Location field in the line item level.
1. Open an existing Special Order (PO).
2. In the transaction from of the Special Order (PO), navigate to Customize > Customize Form.
3. Under the Custom Transaction Form page, navigate to Screen Fields tab > Columns subtab > Location.
4. Mark the box next to the Location field under Show column.
5. Hit Save.