I'm facing the same "random rebooting" problem, but with RLC-410W devices... I've 4 of them and they reboot 1-5 times a day. It's not the power, it's not cabling (as it's wifi), it's not overheating, nothing, but the annoying reboots.
Of course I contacted support and after more than a month we are still is the same circle: psu, cable, poor wifi, router, fw, etc.