@Tmwayera the modt likely cause is insufficent speed which is quite common if you sre using WiFi. The higher the picture quality you are trying to watch the higher the speed the app nedds. The Netflix app has a useful network test in its Get Help menu which shows the speed your streaming device is getting. If that is too low then reducing the picture quality say for UHD to HD should help. Alternatively improving signal strength is sensible thst can be done by making sure your hub and streaming device are not being blocked by being under or behind equipment like a TV. Interferencecfrom your neighbours' WiFi networks can also be a factor but having a strong sigbal from your network usually deals with the issue unless your neighbours equipment are very close.
In many homes you need more than a single wifi router to get coverage in every room Sky can sell you a psckage that can give up to 3 extender pods in they are needed see https://www.sky.com/help/articles/sky-wifi-max or alternstively there are many third party wifi systems you can buy.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
