Hello Steve,
Sounds like some troubleshooting may be needed! The first thing I would recommend testing is the network connectivity, you mention this is ethernet, so as long as this isn’t a loose or bad cable there shouldn’t be a loss of connectivity. If you are seeing an unstable connection both connectivity and bandwidth wise but have ruled out it being the ethernet cable/connection then I would recommend RMA’ing the unit as this could be a hardware issue of some kind.