A very knowledgeable tech came by this morning. He said the connection to that room was of very poor quality so he changed out with a new connector and wall plate. He also changed out my other connections to the newer ones he had with him, so I have fresh connectors and wall plates. We had the C61 running for 30+ minutes in my master bedroom and it was flawless. no weird hiccups/freezing that I had experienced previously.