@Tweety_63 When Deco mesh runs in Access Point mode, IP address reservation is done on ISP router to which Main Deco is connected.

vecii wrote @Alexandre. I heard in the forum that another user had suffered from a similar problem in the past. @vecii To address this part specifically. I also saw claims on that forum that rogue...

@vecii Your concerns are understandable. In your case, it would make sense to get WiFi mesh with whitelist (allow list) feature, which lets you explicitely permit devices to join your WiFi network....

@pasta6649 Great. Then, I have simple solution for you: switch Deco mesh to Access Point mode and everything should work again. See Switching a Deco to Access Point (AP) Mode In Deco AP mode your wan...

@pasta6649 Do you have Main Deco connected to the main WAN router?

@vecii It is your iPhone or iPad most likely. The feature is called "Private WiFi Address," also known as "MAC address randomization." This is how to turn it off for Deco mesh SSID in your Apple...