Primary isolated run:
{
  "nativeTop": 59,
  "shelf": { "top": 0, "height": 852, "paddingTop": "0px" },
  "chrome": { "top": 0, "height": 48, "paddingTop": "0px" },
  "shell": { "top": 0, "height": 852, "paddingTop": "0px" },
  "toolbarTop": 6
}

Second clean isolated run on separate ports and data:
{
  "nativeTop": 59,
  "shelf": { "top": 0, "height": 852, "paddingTop": "0px" },
  "chrome": { "top": 0, "height": 48, "paddingTop": "0px" },
  "shell": { "top": 0, "height": 852, "paddingTop": "0px" },
  "toolbarTop": 6
}