I have a similar issue. All devices are WIFI connected (but see later). The internet stays connected for maybe a day or so sometimes less, then all devices lose internet connection (except a work vpn which maintains its connection throughout). If i attempt to reconnect a device that's dropped off says no internet (wifi is fine and connect to router ok), this is true for wifi and also ethernet connections (if i plug in network cable instead which dont normally do), only solution is to reboot router and then its fine for another while maybe a day or so maybe only a few hours, time varies.
If the issue happens and the work vpn is not connected then that too will not connect as says no internet, but as i said earlier if it is connected it keeps the connection up.
During the process BT issued 2 replacement smart hub 2 devices, and even supplied a wifi disc (but it was never about the wfi), no difference, said the line was fine, I asked about any external issues, said that wasn't needed as that wasn't the problem.
Their speed test results say Poor, and there may be a problem with your internal setup, and then its says
This went on for several weeks, and I then set up a ping to google.com to see exactly when the connection failed time and date recorded and showed all the response times, BT then said they could see drops of less than a minute on the line, eventually they said they would get a network engineer on the case (even though they said earlier it wasn't needed), so I have an external network engineer coming out next week to fix the problem - fingers crossed, Ill update more next week.
