Phantom cube and inventory design.

(reference: What is the best way to implement this kind of inventory? - Editor Scripting - Unreal Engine Forums)
Hello guys!
Have any of you encountered the problem when an actor is not fully destroyed if constructed (Construct Object from Class | Unreal Engine Documentation) object have that Actor as the owner?
Or maybe somebody already made an inventory that works with Objects instead of structs?
Example: Imgur: The magic of the Internet