@hek The capacitor addition seems to be helping. So far 9 hours and all the values are updating as they should YAY!
I'll continue to monitor but i'm hopeful that this is the solution.
@NeverDie Yes, you are correct - it is based on ATMega1284P. So not relevant
My point is that I'd rather stick to the datasheet rather than overclock, but that's just me. And yes I realise that Moteino is overclocking, but the size, voltage and flash are really appealing to me.
