Export with svg icon not working for svg type

As a follow up on https://github.com/highcharts/node-export-server/issues/384 I encountered an issue with version 5.0.0.
It is reproducable in the UI of highcharts-export-server when exporting a chart.

When providing the provided options object the png, jpg and pdf are fine. The svg+data version though is not exporting.
No explicit error is provided.

When I remove the marker with "url(data:image/svg+xml;base64,..." it is fine, but I do need this svg icon in there.

{
  "chart": {
    "zooming": {
      "type": "xy"
    },
    "spacingTop": 30,
    "backgroundColor": "rgba(255, 255, 255, 0)",
    "width": 950,
    "animation": false,
    "marginLeft": 90,
    "marginRight": 20
  },
  "title": {
    "text": ""
  },
  "legend": {
    "enabled": true,
    "align": "center",
    "verticalAlign": "bottom",
    "itemMarginBottom": 5,
    "symbolRadius": 0,
    "itemWidth": 300,
    "itemDistance": 0
  },
  "series": [
    {
      "type": "areasplinerange",
      "pointStart": 0,
      "visible": true,
      "marker": {
        "enabled": false
      },
      "data": [
        [
          1746050400000,
          0,
          0
        ],
        [
          1767222000000,
          0,
          0
        ],
        [
          1798758000000,
          0,
          0
        ],
        [
          1830294000000,
          0,
          0
        ],
        [
          1861916400000,
          0,
          0
        ],
        [
          1893452400000,
          0,
          0
        ],
        [
          1903816800000,
          0,
          0
        ]
      ],
      "index": 3,
      "zIndex": 0,
      "color": "rgb(191, 210, 236)",
      "lineWidth": 1,
      "showInLegend": false,
      "enableMouseTracking": false,
      "fillOpacity": 0.15000000000000002
    },
    {
      "type": "areasplinerange",
      "pointStart": 1,
      "visible": true,
      "marker": {
        "enabled": false
      },
      "data": [
        [
          1746050400000,
          0,
          0
        ],
        [
          1767222000000,
          0,
          0
        ],
        [
          1798758000000,
          0,
          0
        ],
        [
          1830294000000,
          0,
          0
        ],
        [
          1861916400000,
          0,
          0
        ],
        [
          1893452400000,
          0,
          0
        ],
        [
          1903816800000,
          0,
          0
        ]
      ],
      "index": 3,
      "zIndex": 0,
      "color": "rgb(191, 210, 236)",
      "lineWidth": 1,
      "showInLegend": false,
      "enableMouseTracking": false,
      "fillOpacity": 0.35
    },
    {
      "type": "areasplinerange",
      "pointStart": 2,
      "visible": true,
      "marker": {
        "enabled": false
      },
      "data": [
        [
          1746050400000,
          0,
          0
        ],
        [
          1767222000000,
          0,
          0
        ],
        [
          1798758000000,
          0,
          0
        ],
        [
          1830294000000,
          0,
          0
        ],
        [
          1861916400000,
          0,
          0
        ],
        [
          1893452400000,
          0,
          0
        ],
        [
          1903816800000,
          0,
          0
        ]
      ],
      "index": 3,
      "zIndex": 0,
      "color": "rgb(191, 210, 236)",
      "lineWidth": 1,
      "showInLegend": false,
      "enableMouseTracking": false,
      "fillOpacity": 1
    },
    {
      "type": "areasplinerange",
      "pointStart": 3,
      "visible": true,
      "marker": {
        "enabled": false
      },
      "data": [
        [
          1746050400000,
          0,
          0
        ],
        [
          1767222000000,
          0,
          0
        ],
        [
          1798758000000,
          0,
          0
        ],
        [
          1830294000000,
          0,
          0
        ],
        [
          1861916400000,
          0,
          0
        ],
        [
          1893452400000,
          0,
          0
        ],
        [
          1903816800000,
          0,
          0
        ]
      ],
      "index": 3,
      "zIndex": 0,
      "color": "rgb(191, 210, 236)",
      "lineWidth": 1,
      "showInLegend": false,
      "enableMouseTracking": false,
      "fillOpacity": 0.3500000000000001
    },
    {
      "type": "areasplinerange",
      "pointStart": 4,
      "visible": true,
      "marker": {
        "enabled": false
      },
      "data": [
        [
          1746050400000,
          0,
          0
        ],
        [
          1767222000000,
          0,
          0
        ],
        [
          1798758000000,
          0,
          0
        ],
        [
          1830294000000,
          0,
          0
        ],
        [
          1861916400000,
          0,
          0
        ],
        [
          1893452400000,
          0,
          0
        ],
        [
          1903816800000,
          0,
          0
        ]
      ],
      "index": 3,
      "zIndex": 0,
      "color": "rgb(191, 210, 236)",
      "lineWidth": 1,
      "showInLegend": false,
      "enableMouseTracking": false,
      "fillOpacity": 0.1499999999999999
    },
    {
      "type": "spline",
      "pointStart": 0,
      "visible": true,
      "marker": {
        "enabled": false
      },
      "name": "1",
      "data": [
        [
          1746050400000,
          0
        ],
        [
          1767222000000,
          0
        ],
        [
          1798758000000,
          0
        ],
        [
          1830294000000,
          0
        ],
        [
          1861916400000,
          0
        ],
        [
          1893452400000,
          0
        ],
        [
          1903816800000,
          0
        ]
      ],
      "index": 4,
      "zIndex": 1,
      "color": "rgba(150, 150, 150, 1)",
      "lineWidth": 3,
      "showInLegend": true,
      "enableMouseTracking": true
    },
    {
      "yAxis": 1,
      "name": "John Doe",
      "type": "scatter",
      "zIndex": 7,
      "data": [
        {
          "x": 1798758000000,
          "y": 0
        }
      ],
      "marker": {
        "enabled": true,
        "height": 18,
        "width": 18,
        "radius": 25,
        "symbol": "url(data:image/svg+xml;base64,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)"
      },
      "dataLabels": {
        "enabled": false
      }
    }
  ],
  "plotOptions": {
    "areasplinerange": {
      "lineWidth": 0,
      "marker": {
        "lineWidth": 1,
        "radius": 3,
        "symbol": "circle"
      },
      "tooltip": {
        "pointFormat": ""
      }
    },
    "spline": {
      "lineWidth": 3,
      "marker": {
        "lineWidth": 1,
        "radius": 5,
        "symbol": "circle"
      }
    },
    "series": {
      "animation": false,
      "point": {
        "events": {}
      },
      "stickyTracking": false
    },
    "column": {
      "stacking": "normal",
      "grouping": false,
      "pointPadding": 0.15,
      "groupPadding": 0
    }
  },
  "xAxis": {
    "title": {},
    "plotLines": [
      {
        "color": "rgb(153,153,153)",
        "width": 1,
        "zIndex": 5,
        "dashStyle": "Dash",
        "value": 1798758000000
      }
    ],
    "labels": {
      "useHTML": false
    },
    "type": "datetime",
    "dateTimeLabelFormats": {
      "month": "%b %Y"
    },
    "min": 1730415600000,
    "max": 1909087200000
  },
  "yAxis": [
    {
      "allowDecimals": false,
      "reversedStacks": false,
      "startOnTick": true,
      "minPadding": 0,
      "offset": 5,
      "labels": {
        "align": "right",
        "x": 0,
        "useHTML": false
      }
    },
    {
      "title": {
        "text": ""
      },
      "labels": {
        "enabled": false
      },
      "minPadding": 0,
      "height": "0%",
      "offset": 0,
      "top": "-6%",
      "categories": [
        ""
      ],
      "gridLineWidth": 0
    }
  ],
  "noData": {
    "style": {
      "fontSize": "20",
      "fontWeight": "normal"
    }
  }
}