source of supply is not updating in me53n from fiori App order from Requisition

Hi,

I am using Order from Requisition APP, to create a PO from Approved PRs.

while doing this, there is a step assign Supplier, i am assigning the supplier and created the PO Successfully.

But in backend, when i checked in t-code ME53N for Source of supply tab for a particular PR item. that tab is not updated with vendor details.

when i checked in created PO it gets updated there.

Purchase REquisiton

PO CREATed with above PR

Is there any workaround to update the source of supply in backend.

Thanks,

Venu