If a router is in stand-alone mode, the chord diagram and the traffic animation do not show messaging traffic.
This is due to the fact that a stand-alone router does not list itself in the data returned from the request to get router.nodes. If the router is configured as an interior router then it will report (self) in the router.nodes list, but stand-alone routers do not. This is by design.
The console does not take this into account and traffic animations and does not show any traffic.