Hello

hoping someone can tell me the answer to this, and I suspect it's something really obvious .. but for some reason certain devices I have will only connect to my guest network, whilst others work better on the guest network than my main network (I also have plenty that work fine on the main network)

examples are my Philips Android TV x 2 (a 2019 model) which just will not connect to the main network, HP Laptops running Windows 7 connects best to guest- my wife's, whilst my exact same model works better on my main network 

I've worked through the settings on the Deco app and can't see anything that would cause this, but then I don't fully trust it as it doesn't even recognise my phone that's running the app is connected to the network :-/

thanks in advance for any assistance