Sleep with OnePlus Watch 2

Detailed description of the problem:
I am using the WearOS Wearable tracking with my new OnePlus Watch 2. I have verified that the app can “see” the watch sensor. I start the app from the watch before I sleep. It seems to only track two states: awake and light sleep. The built-in OnePlus sleep tracking reports the far more detailed level of tracking in all 4 phases. Is there a better sensor to use?
Steps to reproduce:

  1. Connect OnePlus Watch 2 with Ohealth app.
  2. Set Sleep as Android to use the WearOS Sensor for tracking in Wearables.

Version of Sleep as Android:


Switched back to the Samsung Watch 5. It too is now producing simplified tracking in Sleep with the Wear OS sensor.

Hello, is it possible the app is connecting to the wrong wearable? Are they both on and within the BT reach?
Could you please use the Left ≡ menu → (?) Support → Report a bug, and send us your application logs, ideally right after you terminate a tracking with strange results.