Had the same problem with football watched either via Red Button or Sky Sports App on the Q box stuttering massively. My box is on a wired connection to the router, on the latest software and been rebooted a few times none of which fixed it. Watching via Sky Sports app on my iPhone or iPad on the same broadband connection on wifi works fine so definitely some sort of box issue.
Spoke to Sky last night via the chat function and they just offered up replacing the box pretty much straight away. One attempt to ask me to reboot again and also check the software version but i pushed back saying it was on the latest version and i'd rebooted numerous times with no change. This was about 8pm last night and had an email to say the new box is out for delivery today which has caught me on the hop as i was expecting it to be a few days. Had to push the delivery back to tomorrow so i can get the old box and power cable out to go with the remote to be taken back when they give me the new one and be at home for the delivery.
