Welcome to this user forum.
Seems to me that its more an issue with the Samsung TV interfering with the infra red signals from the remote control. You have already proven this.
Have you looked on the public YouView used forum, as I believe this has been reported before? I seem to think its also been mentioned on this forum.
See if its possible to move the YouView box slightly, so that infra red radiation from the TV, does not block the signals from the remote control.
Its certainly not grounds for cancellation, as the issue is with your own equipment, not the BT YouView service.
My remote acts very much in an intermittent fashion. I've mentioned this before so no need for details.
I even went so far as to block/cover all other equipment sensors (proved they weren't working by testing each one in turn) and still no difference in the response of the YV remote with the YV box. Quite clearly there are some here who aren't prepared to accept these boxes (or the remotes) aren't working in the manner they should.
I'm prepared to put up with it until my current contract ends and then contemplate a move elsewhere. I've never had this issue with any other tele-visual equipment (and believe me I've tried almost everything that comes along as I'm a bit over the top when it comes to having the latest in tech).
i have a Panasonic plasma and after a month of this its driving me mad. It is clearly the Youview box at fault.
It would be useful if you could post a picture of your solution for others to emulate please.
The actual BT Youview service is very good but is badly marred by this particulalr issue and I would not currently recommend it to anyone for this reason.