Apple watch AOD stopped working, as well as workouts

Hi,

My apple watch series 5 AOD suddenly stopped working. In addition, when I workout the workout is paused after a few seconds.

It seems like the watch doesn’t recognize that it’s on my wrist or something.

The watch also stopped taking my resting heart rate.

I tried everything, wrist detection is on, aod is on, tried to toggle them on and off. Reseted my watch, unpaired and paired as new. Nothing works. I wonder if this is a problem with the sensor, since nothing changed in settings and no solution works.

Low power mode is off.

Theater mode is off.

Any suggestions?

Thank you.