Functional Area is not copied when create document with reference

Hi

When I create new FI document (FM Earmarked Funds Document also included) by reference from the previous document which contained fund & Functional Area Master, the Functional Area Area Master Data is not copied to the new document.

I've checked my derivation rules about the replacement of Functional Area Master, there is no derivation strategies for this case.

Is this standard of SAP that Functional Area Master will not be copied when create new FI or FM document by reference from old document

Regards

Ton