Thanks for getting back Kevin!

Light status are as follows:

PWR - solid

Powerline - 90% of the time lit/flashing (wired traffic going, getting good speed and no noticable wired packet loss)

Wired - solid

Wifi - intermittent flashes

I changed the SSID several times and all devices have forgotten the previous profile. Devices have been rebooted in between.

I realized I had only performed a factory reset through the web interface, I did one through the reset button now, it behaves the same.

It sat alone on channel 1, the closest other device is on channel 6. I tried other channels but it behaves the same.

All devices can detect the network, have tested on Android and Windows devices. All of them go from connecting to saved or showing the network dropped. Sometimes the windows device gets stuck in "checking network requirements" but never goes any further.

That being said, it seems that is more difficult to find this one, i.e. it takes longer to show up in the list and may sometimes disappear. I am within 2 m of the router getting strong signal (RSSI 255).

It seems that trying to connect to it sometimes causes it to disappear for a while but this is not consistent. After reboot it stabilizes and can take several connection attempts only to later start dropping out intermittently. The SSID broadcast definitely disappears entirely sometimes only to come back later at random times (verified with a separate device just channel monitoring) and then dropping out again. 

Unfortunately the built in logging function of the powerline adapter is really sparse, is there a way to turn on more verbose logging?

One guess would be if some process responsible for the wifi function in the powerline adapter is misbehaving or restarting, but I have no way of verifying that without logs.

Thanks!