Using Samsung Gear S3 - doesn't show HR in sleep grapch and no alarm on smartwatch

Detailed description of the problem:
Smartwatch Samsung Gear S3 is connected to app/phone. But the HR doesn’t show is the sleep graph and I am not sure if the HR information is considered in the sleep cycle data for more accurate awakening.
Furthermore the alarm is set as vibration on the smartwatch but it also doesn’t work and the alarm is only ringing as a melody on the phone.
Steps to reproduce:

  1. Install add-on for Samsung Gear
    2.1. In settings - integration with wearables - checked “HR monitoring”
    2.2. In settings - integration with wearables - Alarm Vibrate from start
    Version of Sleep as Android: