Comment 3 for bug 2058662

This is most likely on the back-end side. Below you can see the websocket message we send for this action, which seems correct.

{
  "action": "off",
  "filter": {
    "id": [
      [id]
    ]
  },
  "extra": {
    "stop_mode": "soft"
  }
}

When attempting to soft power off, the websocket doesn't even respond with an error message, but drops the connection immediately.