Oracle Financial cloud: REST API for invoice Dff and Gdf.

Hello.
This is my global segments of invoice dff.

For example, I fill "testGlobal" (see picture above) field in the invoice with value "GLOB TEST VALUE".

Then I read Dff and Gdf of this invoice via REST API:

Dff: $"/fscmRestApi/resources/11.13.18.05/invoices/300000014922990/child/invoiceDff"

Gdf: $"/fscmRestApi/resources/11.13.18.05/invoices/300000014922990/child/invoiceGdf"

For Dff I have:
"items" : [

{
"InvoiceId" : 300000014922990,


"testglobal" : "GLOB TEST VALUE",


"igGlobTest1" : null,
"igGlobTest3" : null,
"igGlobTest4" : null,
"igGlobTest5" : null,
"invoiceqrurl" : null,
"universaluniqueidentifier" : null,
"__FLEX_Context" : null,
"__FLEX_Context_DisplayValue" : null,

For Gdf I have:
"items" : [

{
"InvoiceId" : 300000014922990,


"__FLEX_Context" : null,
"__FLEX_Context_DisplayValue" : null,

So, I see global segment value inside Dff. It's logically, as you explained before and in the UI of Dff I see the same, see screenshot above.