VA01 screen strange behaviour (line item split)

Hi all,

I implemented the  USEREXIT_MOVE_FIELD_TO_VBAP routine to create a line item split based on some conditions. The tables that I filled on the EXIT are: XVBAP, XVBEP, IVBAP, IVBEP, IVBEP1 and GVBAP.

This line item split works fine for some order types but for some other order types it does not show the generated higher level line item on the screen but it shows the dependant line items:

When I double click on any line item and I do navigate through the line items (with the black arrows on buttons bar) I can see the missing line item:

Then when I go back to the previous screen I can see the line item:

Does anybody knows which filed I have to fill to see the line item on the overview screen?

Best regards,

Gregory.