As I understand it if a server is not communicated with then it has no reason to send messages anywhere, and doesn’t know where to send messages to. If you don’t want to send anything from the topside then you may wish to specify the topside as the server, but then it’s necessary for the device you’re connecting to to send data automatically, which many devices don’t do.
It shouldn’t do, unless you send enough messages that you don’t have sufficient bandwidth for your other communications (e.g. telemetry and video stream).