Bit of a strange one. When temps are below +7c, my 20 just shuts off while listening to music from my phone. There's no shut down beeps or "Goodbye", it just turns off. Power it up again, start up is normal, turn music back on it's fine for a few minutes. Then just off it goes.
Warm day today, 16c. Haven't done anything to the unit. Worked fine all day.
It's been doing this for a couple of weeks now. Firmware is current, after the first time I made sure it was charged fully. After the first time, ensured it was also dry contacts and firmly seated in the holder. Have not ever ridden with this is the rain yet. 1408 series.
My 10 ran fine for three years, all conditions, never a problem.