@JigaWatt it was actually shutting down (all the LEDs off) and impossible to turn it back on using the power button. The only solution was to unplug and replug it, but it would do the same the next...

@Andrsouzaaa Thank you for your help. Ventilation might have been a problem. I moved it now and I will see. As for the firmware update, I would void the warranty if I update as its not yet available...

My RE450 keeps shutting down by itself after a few hours of use. All LEDs turn off and no WIFI is available. Pressing the power button does not work, but unplugging and re-plugging the device works,...