I have a pair of AX80 succesfully running in EasyMesh with ethernet backhaul and recently got my hand on a RE705X to play with it so it replaced the second unit of AX80.

Current position of RE is balcony, rather away from main AX80, getting red led on wifi connection signal because of poor signal. However, near it is an ethernet port which I used for the 2nd AX80 to establish Easy Mesh (AX80 is connected to a switch TL-SG108E, distributing wires in entire home, acting as a dumb switch, no vlans or other fancy stuff).

In the AX80 web menu, RE705X appears as part of EM, connected via wire (975Mbps, no idea why it isn't 1000Mbps), however with a weird IP 192.168.0.254 - my AX80 serves IP in 192.168.88.x class, while for RE I setup a static lease for 192.168.88.3 

Maybe this, maybe the lack of signal, maybe something else, however internet functionality via RE is chaotic; sometimes it works, full speed (I have 1000/25 from ISP, I can get these speeds), sometimes I only get 200/25 and sometimes there's no internet connection via RE. 

I don't want to move the RE closer, I want to use its ethernet port as an ethernet backhaul; it is capable of doing this in AP mode (however, no support for EM atm, afaik) while in repeater mode it seems to be able to do it however with major hiccups.

Any ideas how to solve this? An ETA on a firmware supporting ethernet backhaul?