403 - Player command failed: Cannot control device volume

[_Konstantin]

Dear Community,
we're trying to control the volume of Spotify without affecting the system volume. This is supposed to work with the API 

 PUT https://api.spotify.com/v1/me/player/volume

at least for premium users.

However we're getting a 403 error as response:

{
  "error": {
    "status": 403,
    "message": "Player command failed: Cannot control device volume",
    "reason": "VOLUME_CONTROL_DISALLOW"
  }
}

The device we tested this on was a Samsung 12 (Galaxy S20+) with Android 12.

Did anyone had the same issue / knows how to solve it
Thanks in advance
Konstantin