Just to provide an update - my problem was solved by using the (beta) firmware that was just released today: https://www.snbforums.com/threads/asus-zenwifi-xt8-firmware-version-version-9-0-0-4-386-48966-2022-05-27.79081/
As soon as I saw the change log I knew it was it:
ASUS ZenWiFi XT8...
Thanks for the pointer! That thread looks promising - multiple people have the same symptom (flashing blue light), so I'm trying the older firmware first thing.
I am using the latest firmware version 3.0.0.4.386_48706. But I'll try looking at older firmware versions. Also will try wifi scanners.
I observed something new - the node has flashing blue light very frequently, and found the following that spammed the system log non stopping. The (redacted)...
Tried to set up an AIMesh system with a pair of Asus ZenWifi AX6600 (XT8) routers to improve a dead spot issue, but it seems no matter what I do the client insists connecting to the main router rather than the nearer node.
I have a two story house (2600 sf) but with a long shape. Before setting...