My Shelly i3 became unresponsive, not connecting to wifi. The red light is off, but the device is warm, so I am assuming it gets proper power. I have measured the live and neutral cables and there is no interruption on them (by measuring resitance between the cable's end and the pcb). If I reconnect the shelly, the red light lights up, but turns off after a few minutes. It's not connecting to a wifi network and does not create an AP. The reset button does not seem to to anything.
Any idea what could be wrong?