I'll watch out for LED behaviour next time it fails.  All XE75 units connect wirelessly to each other - only the main XE75 uses a LAN cable to connect to the fibre termination point in my home.

  @intgom I have V2 hardware, but same issue moving to 1.2.10 earlier this week. The units seem to reboot spontaneously a few times a day. When I got look at the log files on the main router right after it happens, they have been wiped clean and start again, so it seems like the main hub unit reboots and starts a clean log file.

Super annoying, as it causes multiple intermittent outages a day in my house right now. I am currently downgrading back to 1.2.9 to see if that makes any difference and I can get it stable again.

  @David-TP Yes, since downgrading to 1.2.9 the reboot issue is gone.

I have about 23 clients connected to the mesh system (with the primary AP + 2 satellites all backhauled over wired connections).

There are a few 6Ghz devices. I turned off beamforming and other features like that on 1.2.10 and still had the reboot issue.

There are probably 5-6 IoT type devices connected as well.