[Bug] Empty space above Card when it is embedded as Single Visual

We display PowerBI report visuals with the Microsoft embed library https://github.com/Microsoft/PowerBI-JavaScript in a custom web container. We embed a single visual as explained here https://github.com/Microsoft/PowerBI-JavaScript/wiki/Embed-Single-Visual. All our visuals (e.g. Line, Table) are displayed correctly, except visuals of type Card. Only Card visuals have css style {top: 60px;}

In settings object of an embed these visuals have the following values

{
  "localeSettings": {
    "language": "en",
    "formatLocale": "en-US"
  },
  "filterPaneEnabled": false,
  "navContentPaneEnabled": false,
  "background": 1,
  "visualSettings": {
    "visualHeaders": [
      {
        "settings": {
          "visible": false
        }
      }
    ]
  },
  "layoutType": 1,
  "customLayout": {
    "displayOption": 0,
    "pageSize": {
      "type": 4,
      "width": 350,
      "height": 200
    },
    "pagesLayout": {
      "ReportSection28597ec2e72b1fca03df": {
        "defaultLayout": {
          "displayState": {
            "mode": 1
          }
        },
        "visualsLayout": {
          "8a5ae98a6614fee5dd79": {
            "displayState": {
              "mode": 0
            },
            "x": 1,
            "y": 1,
            "z": 1,
            "width": 350,
            "height": 200
          }
        }
      }
    }
  }
}

As you can see, filterPane, navContentPane and visualHeaders are set to false. So, nothing should be above or around it...

Has somebody came accross this issue or similar? Is it a bug or we miss something?