TEST
{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 5021],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutBlockFlow (positioned, children-inline) DIV class='fixed'",
      "bounds": [36, 20],
      "transform": 1
    }
  ],
  "transforms": [
    {
      "id": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [10, 10, 0, 1]
      ]
    }
  ]
}

Prefer non-composited scrolling