I also realized that when the X50 was in "hotspot backup mode", the system time did not propagate from the X50 to the M9plus; I saved a screenshot After the connection on the WAN port was available...

@william512 Thanks for your suggestion. Now the internet provider restored the connection and the network works in the normal way. Just before this, I was thinking about using a CAT6 lan cable to...

Today my wireline connection is down for a general issue of my internet provider. I had configured a backup wifi mobile hotspot that is active, but only the main X50 is connected, the "satellite"...

@jupiter hello, the system time shown by Deco app is the current time in my country, time zone GMT+1

Hello, I have the same issue reported in https://community.tp-link.com/en/home/threads/topic/712736 I have a main Deco X50 with firmware 1.5.5 Build 20240718 Rel. 44414 and 3 satellites M9 Plus...

@jupiter I solved deleting the cache of the app, now it works fine. Is the config saved in the TP-LINK cloud? I mean, I should retrieve my config when I access with my account from any installation...