Load Error with DeferredDependencyLoading

If re-define the macro USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING to 0, the component is editable in detail panel. But I'm sure it's not a good fix.

1. Open any project in editor
2. Create a Blueprint derived from SkeletalMeshComponent
3. Create a Blueprint derived from Character
4. Open the newly created Character Blueprint
5. Choose skeletal mesh component and replace the "Component Class" with the newly created BP_SkeletalMeshComponent
6. Restart the unreal editor, and open the newly created Character Blueprint

Result:  Detail panel of skeletal mesh component is empty, and log shows: 

PLACEHOLDER-CLASS_XXXX is not a legal override for component XXXXX