Forerunner 245M: steps, run cadence and movement at night remain always at 0.

I bought a new forerunner 245M just a few days ago and am facing several technical issues:

- steps count and run cadence stays at 0 on watch and Connect (e.g. I ran 7.5 km which the gps recorded fine but 0 steps and 0 run cadence)

- movement during sleep stays at 0

- Pulse Ox can't take any measurements (either manual or at night) even though the red light glows

Stress can't be measured (always says I'm too active even though I am standing still or even in bed)

I've tried resetting the watch to default settings: same problem. I've tried to install your latest firmware (Ver. 3.52, Beta): same problem

Any suggestion ?