Surfing the net through WiFi was fine then suddenly, this happened:
When I boot / start the Pi, the WiFi connection becomes unstable. I can't connect to the internet whether through phone or laptop but when I shutdown the Pi, everything comes back to normal. I have tried booting and shutting down the Pi, and found out that when the Pi connects to the network, the internet really becomes unstable or lose connection.
Any idea what's the cause? This just happened today. I am using a freshly installed Raspbian Stretch with a few apps installed like kweb etc.