No deep sleep detected

Detailed description of the problem:
since ~10 days the sleep tracking does not recognize deep sleep phases thorugh my Samsung Watch 4 anymore.

Before that, I had ~20-40% deep sleep every night.

Any idea why the tracking is inaccurate?
SAA version: 20220830
Phone: Pixel 6, Android 13
Samsung Galaxy Watch 4, version from 5th Sep. 2022

Hi, would you get the same strange graph if you reboot the wearable before going to the bed?
You can use the Left ≡ menu → (?) Support → Report a bug, and send us the logs, ideally right after you finish the tracking in the morning.

Hi, will do so tonight and send the logs tomorrow and report!