Hi, Ive got a Samsung 65S90C and had a problem with the inbuilt NowTV app not showing UHD channels in channel listing a few months ago. This was fixed with an App update. 

My problem now is when selecting Main Event UHD or F1 UHD I just get the blue circle buffering circle and then it says there is a problem.

Its not my broadband as I have 250mbs and Sports 1 UHD and Sports 2 UHD work fine. 

I've logged out and in and same problem

I've uninstalled the App and reinstalled the app same problem

Its always the same 2 that dont work and the same 2 that do

Anybody else had this problem

Brent