Hi @Martin_Joyce ---- Thank you for touching base with me and providing the requested feedback. Very appreciated!
Moving forward, can you please verify the make and model of the device hosting your core? I see you had mentioned a Sonic Orbiter being connected directly router, but that is network endpoint, similar to the MicorRendu.
Furthermore, if you are noticing this behavior via the BlueSound application, this would suggest a more general issue, more than likely a networking one. What is the make and model of the router you are implementing?