CheckDefaultSubobjects() appears to not properly validate Blueprint Class instances

It looks like maybe CheckDefaultSubobjectsInternal() isn't set up to handle non-native (i.e. Blueprint) class types? As well as AActor::CheckActorComponents() perhaps?

1. Create a new (blank) project.
2. Modify DefaultEngine.ini with:

[Core.Log]
LogCheckSubobjects=Error

3. Launch the editor. Several errors should now appear of the form:

LogCheckComponents:Error: Component archetype is not the CDO nor a default subobject of my class.

Followed by an assertion in UObject::CheckDefaultSubobjectsInternal():

CompCheck(OtherReferencedSubobjects.Num() == 0);

%s has a reference to default subobject (%s) of %s