After creating invoice from P48121, business is popuating as 1 instead of business unit from the job

After creating invoice from P48121, business is popuating as 1 instead of business unit from the job in the F03B11. Is there a way to make the F03B11 populate with the business unit from the job?

Steps to duplicate -

1) Enter a Service Billing transaction. Have the account as billable. Can enter a Journal Entry or through Update Quantities from Job cost.
2) Bring record into workfile - through R48120.
3) From Service Billing - Work with Batches P48221 - Create an empty batch
4) Select Batch- then Form exit to Create Invoice
5) On P48121 enter customer and company and dates - then hit submit