Dear Nisshoku,
Can you show us the .h for your .cpp shown above?
Can you temporarily try something other than SceneComponent just to see if it is related to scenecomponent somehow?
**Must Attach to Root Component**
You are not setting the attach parent for these new components it looks like!
```
ActiveGroup->AttachParent = RootComponent;
InactiveGroup->AttachParent = RootComponent;
LootLocations->AttachParent = RootComponent;
```
:)
Rama