Niagara Components can unregister themselves in the process of component registration

Spawn system attached with a system where bAutorDestroy is true and one data interface is invalid will crash the engine.

1. Use the spawn system attached blueprint node to spawn a Niagara system
2. setup the system to have an invalid data interface, and mark it for auto destroy (bAutoDestroy)

Result

The engine will crash with this error: "Failed to route OnRegister"