Back to back order with Internal Req Requested line status

 Hello ,

I have created back to back order with an ATO item. I have setup a transfer from sourcing rule for this item.

Since I wanted to transfer the item from another inventory org and then ship it to the customer.

The B2B order created an Internal req as expected on progressing the order . I have created the ISO from IR, then shipped and received it in inventory org where it will be shipped to customer.

Inspite of completion of the above steps the line status is still "Internal Req Requested".

I tried running workflow background but no help. Since the ISO has been received, the B2B order line should change to awaiting shipping but this isnt the case.