When I moved into my current house I had issues with connectivity with my SB6141. When I checked the signal diagnostic page for the status of the signal the signal to noise ratio was very low. I didn't have a use for any of the other cable jacks in my house so I streamlined the setup. I took out all splitters and went straight to my modem. This helped a lot and was able to have semi stable internet.
Fast forward to now, I have always suffered from service that disconnects and my modem is able to reconnect pretty quickly. Usually the disconnects last 5-10 seconds. When the connection is live, the speed is great and the latency is awesome. But the disconnects occur lately at intervals of 10-15 minutes.
Example of signal which I believe is now acceptable: