Why is the SLA Source 'Warehouse Name' not working for the Event Class = Receivable?

Need your help to derive the cost center from Mapping Set for the receivables class. We have common receivables transaction type and that is being used multiple inventory organization Sales orders and every inventory organization has mapped to a unique cost center. So, based on the distribution inventory organization, the system should pick the cost center for the Receivables and revenue class from mapping set and should create the accounting.

For this scenario I am able to generate the cost center for Revenue class from Mapping Set but with the same accounting rules, the system is not able to pick up the cost center for Receivables class from Mapping Set. It is picking the default cost center from the transaction type which is wrong as per our business required.