I do not see the devices displayed under the online devices list and normally, i will blacklist these unknown devices. Will you see the same devices displayed under the online devices list? That is correct, none of the devices belong to me or my family. None of the devices listed in Messages belongs to you, right?
Also, do not share new SSID and its password with anyone in your household for some time, just to make sure nobody shares it without your TP link team, please see my reply in red.
You will have to manually reconfigure every WiFi device in your household to connect to new SSID, but this is worth spending time doing. In that screen, change name (SSID) of your Main Network to something completely different from before, change password to something that is not easy to guess, and enable 'Hide this network from WiFi lists' setting. In WiFi settings, touch Main Network Name (SSID), a new screen will appear. You can hide it from everyone, that might help. If these unknown devices keep appearing, even after you confirmed Guest Network is disabled, it means they connect to Main Network. This is sample of WiFi Settings page, Guest Network is enabled:Ģ. If you do, by default it is enabled without password. Do you have Guest Network enabled? You can check it in WiFi Settings in Deco app. More things to consider, as long as you are confident these are not devices from your household.ġ.