@NickDems Now that you know what log lines are relevant, you can try different scenario on your home network to pinpoint where the issue is. You can disable DNS service on pi-hole and see if this...

@NickDems Well, here they are: Sun Feb 26 19:08:14 2023 daemon info conn-indicator: <31330300> Invoke led: conn[1] Sun Feb 26 19:08:14 2023 daemon info leds: Event: conn.offline Sun Feb 26 19:08:14...

@vDex Thanks, I now have the whole picture. You really do have Deco P9. For some reason, they can't talk to each other on powerline, it appears. They use WiFi to connect to each other. Sadly, you are...

@vDex Thanks. I have better picture now, screenshots are easy to read. I notice you have Main Deco and one of Satellite Deco with the same name "Couloir", I did not know it is possible to give two...

@NickDems I would say, these logs lines you should be concerned with: Sun Feb 26 19:21:55 2023 daemon.err miniupnpd[18139]: Failed to get IP for interface br-wan Sun Feb 26 19:21:55 2023 daemon.warn...

@vDex Thanks for screenshots. From your initial post I assumed you only have two Deco: Main and one Satellite. Your screenshot shows four Deco in total. That is important information for...