I've given up!
I'm using 3 Lyra AC2200 with 1 as master accepting the wan, second port is going to a 5 port gigabit un-manged switch, both remote Lyra’s also connect to local un-managed switches for NAT hard-drives, TVs, games consoles etc.
All works well up-to the point we sometimes notice wireless devices fail to switch over to the local node and therefore experience drop in connection, turning wi-fi on and off on the phone will usually help correct this, so was happy to see the new firmware appear
Kind of the whole reason for investing in these in the first place!
Initially updated to the new firmware through the app, the settings remained but both remote lyra nodes failed to show anymore in the app or webpage and any device connected to the remote lyra has no internet connection, even though the LED on the Lyra is Green?
After power recycling the remote lyra nodes again and again after countless full resets to all nodes, nothing connected right, they appear to setup initially when adding the remote node into the network then fail to show in the app is connected afterwards, connect Ethernet back-haul and the LED turns green on the remote node but they fail to show from the web page or app with or without devices connected,
Even removed all hardwired Ethernet devices so Backhaul is only Lyra to Lyra without success and tried with only wifi connection
I had some success by reloading firmware version 3.0.0.4.384_45122 to the main lyra, then it would setup both remote nodes and they appeared to work ok though the remote lyra firmware is still running on the new version 3.0.0.4.384_45891.
In interests of stability I rolled both remote nodes back to 45122 as well.
To roll a remote node back not a simple task either.
Hold reset of the remote node, wait until its turned white.
Connect laptop directly to the lyra SSID
Open setup webpage 192.168.1.1 etc
Setup a new temporary SSID and password.
Wait for the Lyra to reboot and connect to the new wifi SSID
login with the new credentials, select manual setup of internet connection to get to the admin page
where you can load firmware to roll back to the previous version
https://dlcdnets.asus.com/pub/ASUS/...30.633074370.1558714817-1170293942.1548827571
Do the same to all your remote nodes and bam your back in business
So much of easy updates though the friendly app...grrrrh.
Will try again with the next version or find something else and sell these on ebay