Detailed companies are not displayed in a form when parent is selected

I have a form, when I select a cost center at Level 0, is displays something like below

But I select, a parent cost center, I see this, added screenshot from ePBCS and HP.

EPBCS - I should be seeing ME (Entity) along with it's Level0 children

HP - JOA parent is renamed to A212 in ePBCS, and we see all level entity even when parent is selected.

Any leads appreciated.