@TP-Link Found the problem ... You are right, I tried to update the wrong room, this is a V1. I was convinced that I was using the correct IP address ... It would be nice if the HW / FW versions and...

@TP-Link Correct, my main deco is a Deco M9Plus V1. I uploaded the FW via the GUI of the V2 satellite. I also tried to upload FW 1.5.1 for the V2 and seems to have the issue

My current version of my Deco M9 Plus V2.0 is 1.5.1 Build 20210126 Rel. 59387. I am trying to upgrade it to 1.5.3_210309 by it fails over and over. - downloaded latest FW from TP-link site...

@Longface I solved this issue temporarily by adding a local DNS rule on my pi-hole. A normal router should have a simular function to redirect dns. The IP address will change over time... but till...

@Longface I facing the same issue. After updating to Deco M9 Plus(EU)_V1_200324 (1.4.0 Build 20200324 Rel. 51287) all my M9 devices are trying to connect to eu.pool.ntp.org Top Clients (total) Client...