Sky Q box keeps disconnecting from Wi-Fi (not through sky) but Wi-Fi working everywhere else

[Gem52]

I have internet through Cuckoo and it works fine on our phone / tablets, however every time I switch on the TV it says 'it looks like you have no connection' and I have to set up Wi-Fi connection from the beginning on Sky. Every time I turn off the TV and turn it back on. It's now starting cutting out midway a film and I have to reset the whole thing. Pretty annoying. What can be done to solve this issue?