Thanks. I opened a support ticket for it (SUP-114533).
I can repeat this problem on my ax3; wifi1 locks up, wifi2 doesn't.
It seems ok to me.Was the temperature an issue? I recently set up my ax3 and as ap only with 3 idling clients and a CPU load of 1% at 19°C it sits at 53°C. Should I be concerned?Sent it back to the Service, it is broken and will be replaced