Wordpress Visualizer Plugin: Number Format for Data Series in Column Chart only applied in Chart Preview

Question

When using Google Charts engine and producing a column chart, the Chart Settings -> Series Settings -> Number Format formatter in the chart editor is applied in the Chart Preview area in the wp admin panel but is not applied in the final rendered chart in my wp website page when using the following Manual Configuration:

{
"vAxes": {
          "0": {
            "title": "Notional Advised (bn)", 
            "ticks": [10, 30, 50],
            "titleTextStyle": {"italic": "false"},
            "gridlines": {"color": "light-gray"},
            "maxValue": 50,
            "format": "$#"
          },
          "1": {
            "title": "Clients Advised", 
            "ticks": [10, 30, 50],
            "titleTextStyle": {"italic": "false"},
            "gridlines": {"color": "light-gray"},
            "maxValue": 50
          }
        },
"series": {
          "0": {
            "targetAxisIndex": "0", 
            "color": "#b7d988"
          },
          "1": {
            "targetAxisIndex": "1", 
            "color": "#aedeea"}
        },
"italic": "false", 
"fontName": "Arial",
"fontSize": 16,
"hAxis": {
  "tickColor": "white"}
}

I've looked for a manual configuration option to get the series' number formatting back, but haven't come across anything in Google Charts' docs: https://developers.google.com/chart/interactive/docs/gallery/columnchart#dual-y-charts

Any ideas or workarounds?

NOTE: I've opened this as a potential issue on Visualizer's github repo (https://github.com/Codeinwp/visualizer/issues/542) in case it is a legitimate bug, but hoping for some interim guidance :)

Thanks!