I have a very strange between my OnePlus 6 (Android 11) and Archer C7 v5 running (OpenWrt 21.02.2 or 22 rcX (don't remember which version I tested) and 21.01 running non-ct drivers).
Every morning I wake up to see my phone connected to WiFi but showing "No Internet" next to SSID. Even stranger is that if I switch to a different router or turn wifi on or off it still shows "No Internet" sometimes even 4G shows that status. It gets fixed only by me restarting the phone.
This sounds more like phone problem not router one, however this does not happen if I am running stock firmware on my router.
So, what happens at night to cause a device to not only lose internet connection without losing wifi connetion?