I have recently purchased a QE65QN95A which is having network issues. Every other device on my local network is not experiencing this and looking at some of the other forums on the net this seems to be fairly common on the newer Samsung TV's. My old KS9000 65 does not do this and while it's not a major issue I find it annoying you have to acknowledge it for the issue message to go away. What with the awful volume up and down box every time you change the volume that you can't disable (it's connected to a Sonos arc) I'm half minded to send it back or exchange for another brand.
The one connect box is connected via cat6 to a switch. I have swapped out cables, updated the firmware to the latest version and it's still happening.
£3k on a TV - I expected the basic things to work. Samsung - are you even aware of this?