Some channels wont load on Nvidia Shield TV

Hi, so im using a Raspberry pi 4b with the XBOX tv tuner and a lot of channels play fine using the live channels app on my Nvidia Shield but sometimes some channels wont load.
Also I have a Hauppauge WinTV-soloHD which I have tried connecting to Pi and its shown as connected in Tvheadend but it wont find any Channels. Any ideas ..??