Externally referenced object in details panel does not show full amount of children

Hi, I’m using DetailCategoryBuilder::AddExternalObjects to reference other objects in a custom details panel - however to does not full show all info on the object:

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However, when I display the same actor via the ChildActorComponent it displays the full object without any trouble:
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Can someone explain how I get my details panel to behave like the ChildActorComponent panel?