Why is there a green flashing WiFi light on my hub? It was there yesterday and I switched the hub off & then on again & it had gone. It’s now back & I don’t have good connection. No connection in 2 rooms where there normally is, & a lot of buffering/slow connection. This happened a few months ago; I’ve not been with Virgin a year yet & I’m not impressed that I can’t speak directly to someone. Does anyone else have this problem?