It appears using the attribute reader with the shape location module set to torus will cause NaNs. The log mentions Sphere Radius among them, which should not be used with the torus mode.
The system will work correctly after opening it in the Niagara editor
The system will behave as expected when loaded.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-194597 in the post.