@viackyp I have a site where I am set up for Fibre->Nokia ONT->ER605 with no such issues. Are you running the ER605 in Standalone mode? My ISP uses PPPoE to authenticate, but I'm not sure what the...

@Munch1 Re-enable 5ghz (but leave 6ghz disabled). And pick the mid channel available and set it as fixed on your root AP in the 149-167 range. Try that for a few days.

@viackyp Can you put your ISP router into bridge mode? Is your router rebooting at 11:05pm...ie if you run a continuous ping from 11:00 to 11:10, do you lose ping responses from the TPlink router's...

@Munch1 How are you powering Drawing Rm and Bureau? Ideally you would use POE injectors, using a POE switch could cause issues because the etherlink will show as up. Also, pick an optimal 5.8G...

@viackyp Is your ISP changing your IP daily, that may cause a number of processes to run inside the router to recalibrate based on the new IP. Is it possible to shift your IP lease renew time to say...

@GNH I have pretty much the same setup at one of my sites (3 EAP225-outdoors and an EAP615-wall inside), and I agree with @Hank21 about using an outdoor AP as the root. I use (and love) the...