Welcome to the forum
What is your broadband speed, if you have the tv connected by wifi try connecting it with a cable from the hub, also remmber to watch sky glass min broadband speed is 25mps for hd and 35mps for uhd channels, you can check what speed your tv is getting by opening netfix app going to help and run check my network, also remmber that your broadband speed is to the hud and the more devices you have connected the slower it gets for sky glass to work without freezing your tv needs to be getting 80mps
P c marlow
