So I bought an AX12 unit yesterday and tried out the Easymesh thing but cannot get it working properly (see my test setup at end of post).

What happens just after rebooting both routers is:

• Computer 2 gets a very slow network connection, network performance is about the same speed as connecting to Main Router over wifi from Computer 2's location, which makes me suspect ethernet backhaul isn't really working. Wifi coverage in this location is very poor (thick concrete walls) which is why I have an access point there.
•  tplinkwifi.net says I'm not on the same network as the router, the admin page must be accessed using IP address (no big deal)
• A little while after full system reboot Computer 2 loses network access entirely, I think about 5 minutes or so after the routers have booted up (maybe this is ethernet backhaul kicking in, and the LAN<->WAN interface isn't bridged, only LAN<->WLAN? hmm).

If I disable Easymesh on the main router and setup the satellite router in AP mode everything works great, but then I lose seamless roaming.

Main router is AX12 V1 and satellite/AP is AX10 V1. EU models on latest firmware.

I also have another AX12 instead of the AX10 I can try but I really need the extra LAN port on the AX10.

What I could also test is plug LAN1 on main router into a switch instead, then plug Computer 2 and the satellite router into the switch, but I would like to avoid the added clutter.

Question is if this just doesn't work, i.e. you cannot use the LAN ports on the easymesh satellite in this manner?