OM AR Service Mapping (Copy DFF) - Context value in AR is gets default even if there is no OM DFFs

Summary:

We have enabled Service Mappings and implemented an algorithm to copy Order Management (OM) EFF values to Accounts Receivable (AR) Invoice DFF. The mapping is working correctly, and the EFF values are successfully being populated into the AR Invoice DFF.

However, we are facing an issue where the DFF context is getting defaulted across all Business Units (BUs).

Our expectation is that the DFF context should default only for the specific BU when DFF value is populated, not for all BUs.

Is there a way to restrict or control the DFF context defaulting so that it applies only to the intended Business Unit?