This started yesterday.
My smart apps are set to UK and I access US Netlix via a dns service. When I try to watch some programmes I get a message that I don't have an internet connection, and yet when I click on other Netflix programmes they play. Sadly most that I want to watch are in the first category. I can stream BBC iplayer easily via the TV, so it's clearly not an internet problem. I can access all the US Netflix programmes ok on my laptop. I set the dns in the modem, and I have not set the dns on the tv.
I can, of course plug my laptop into the tv with an hdmi, but I'd rather use the app.