@GajusTempus I think I found the reason and solution for this problem: I switched the Deco configuration from Router to Access Point. That solved the issue for me - all wired Decos are now providing...

I got a similar problem with my set of 3 Deco M5 - all three on version 1.4.4 Setup: Main Deco connected to the router via cable. Second Deco is at the edge of the first one's WiFi-signal, but also...