Why is the Ship-To on the BPA not used when doing releases from the MRP Workbench?

We have 3 buildings and we define which buildings parts are to ship to in the header of the BPA.  If we create a manual release from the PO Summary form for a specific item(s), the release lines will default to the Ship-To location on the BPA.  However, if you do a release from the MRP Workbench, it will create a requisition which will create a BPA Release.  However, that same item(s) will NOT default to the Ship-To location on the BPA.  This is causing issues with getting parts delivered to the wrong building and causing friction between the buyers