Not able to update orders after Create billing line request started -- (SR 3-33599370251)

Please find the sequences of steps we are following currently,

--> Create quote in CPQ and submit for order creation.

--> Through Mulesoft order has been created in OM fusion as well as EBS.

--> The initial status of order line is "To Be Shipped" for Hardware item and PAUSE the line from processing point of view.

--> Actual hardware shipment is done from EBS, upon successful shipment EBS sends a signal to mulesoft.

--> Mulesoft will release the PAUSE in OM fusion line and the status of the line became "AWAITING BILLING"

--> Once it is in "AWAITING BILLING" it populates the invoice details in fusion AR interface table which we extract through BIP report and send it back to EBS, where we generate customer invoices.