I'm sorry to hear that, are all devices affected by this? Can you log into your hub manager via this URL http://192.168.1.254 and check the bottom of the main page and confirm the firmware version you're currently on?
I have had this issue since upgrading to a hub one when I moved in January. 5ghz works for about a week and then stops. I have normally resolved this by restarting the router. I saw the article linked by Drewe and realised I was not alone. I have split the two channels now so I can see when the 5ghz dies and will report back to Plusnet.
I was about to buy a new router but will hold on as the issue clearly sits with the Hub's firmware
Apparently it is a firmware issue. Have you tried connecting to 2.4ghz? If you log into your router using the link above you can split out the two channels and give them separate passwords. This means if the 5ghz channel dies, you still have the other one as fallback. It does mean you need to set all your devices to log onto both automatically.
As you have worked out, this is the firmware bug. As you will have also realised now, Plusnet staff are slow to respond on the issue and still reluctant to admit it exists to new threads which report it. The main thread on the issue is here :- https://community.plus.net/t5/My-Router/Hub-One-losing-internet-connection-on-5Ghz-WiFi-only/td-p/16... and is the one referred to in the article on ISPreview. I started the thread here in April and as you can see there are now 28 pages and absolutely no meaningful progress. You will be better off following and posting on that thread rather than starting another one like this. The latest post on there is the usual update from Plusnet staff claiming that they are working on the issue. I am waiting for a response from Bob Pullen and will post there if and when I get a meaningful update on any progress.
