I noticed that if you read the pulse-ox, then the stress detector does not work anymore ... you only see line ... someone has happened? Is the light from the cardio detector always flashing or even fixed? to me it remains almost always on steady

I am running my 6X Pro Solar in parallel with my 5X+ and synching to different accounts until I am happy that the 6X is producing sensible numbers. As far as I can see everything is just fine so far, with a small question mark over wrist HR when active, but not recording the activity.

Anyway, today I enabled pulse ox on both watches at about 11:00 this morning. Both watches have produced pulse ox readings and stress readings all day long since. This is today's data from the 6X on the left and 5X+ on the right. Stress data appears unaffected by the addition of pulse ox from 11:00 onwards and for the most part is quite similar. There is a gap in the data from the 5X+ when I was charging it this afternoon/evening.