Web Chart Component Not Displaying using results.from-graphics

Hello,

I'm trying to pass data from a “Query Layer” activity to show in a chart configured in web. However, the workflow runs to completion and the chart is not displayed in web. Below is my sequence of activities and their configurations:

Get Map

Get Layer

Query Layer

   Layer: =$layer1.sublayer

   Output Fields: ="INSTALL_DATE,MATERIAL,MAIN_DIAMETER,OWNERSHIP,SHAPE.STLength()"

Get VertiGIS Feature (VSW)

   Operation Name: results.from-graphics

   Operation Parameter: ={graphics: $query1.features}

Display Charts (VSW)

   Command Name: charts.display

   Command Parameter: =$vertiGISfeature9.result

Activate Panel (VSW)

   Command Name: ui.activate

   Command Parameter: item://chart/3d6d553a-c839-4de9-80e3-97039a097618

When logged, the value of $query1.features shows something like:

[
   {
       "aggregateGeometries": null,
       "geometry": null,
       "symbol": null,
       "attributes": {
           "INSTALL_DATE": 1370217600000,
           "MATERIAL": "Concrete Pressure Pipe",
           "MAIN_DIAMETER": 450,
           "OWNERSHIP": "XXXX",
           "SHAPE.STLength()": 710.4460
       },
       "popupTemplate": null
   },
   {
       "aggregateGeometries": null,
       "geometry": null,
       "symbol": null,
       "attributes": {
           "INSTALL_DATE": 1136073600000,
           "MATERIAL": "Concrete Pressure Pipe",
           "MAIN_DIAMETER": 450,
           "OWNERSHIP": "XXXX",
           "SHAPE.STLength()": 150.47994
       },
       "popupTemplate": null
   }
]

In the VertiGIS chart component I have the source set to the correct workflow, with the Group By and Group Values set to INSTALL_DATE and MAIN_DIAMETER. Using results.from-graphics should pass VertiGIS Features (rather than Esri Features) to the next activity. Am I missing a step here?

Thanks in advance