conditional styling is not being applied in dash-ag-grid v31.3.0

[e-wallace]

expected behaviour:

sample code:

import dash_ag_grid as dag
from dash import Dash, html
import dash_bootstrap_components as dbc
import pandas as pd
import os


app = Dash(__name__, external_stylesheets=[dbc.themes.BOOTSTRAP])
server = app.server

df = pd.read_csv(
    "https://raw.githubusercontent.com/plotly/datasets/master/ag-grid/olympic-winners.csv"
)

columnDefs = [
    # Row group by country and by year is enabled.
    {
        "field": "country",
        "rowGroup": True,
        "hide": True,
        "suppressColumnsToolPanel": True,
    },
    {
        "field": "sport",
        "rowGroup": True,
        "hide": True,
        "suppressColumnsToolPanel": True,
    },
    {
        "field": "year",
        "pivot": True,
        "hide": True,
        "suppressColumnsToolPanel": True,
    },
    {
        "field": "gold",
        "filter": True,
        "aggFunc": "sum",
        "valueFormatter": {"function": "d3.format('(,.2f')(params.value)"},
        "cellStyle": {

                "styleConditions": [

                    {
                        "condition": f"params.value < 100",
                        "style": {"backgroundColor": "lightgreen"},
                    },

                ],
                "defaultStyle": {"backgroundColor": "yellow"},
            },

        },
    {"field": "silver", "filter": True, "aggFunc": "sum"},
]

app.layout = html.Div(
    [
        dag.AgGrid(
            id="enterprise-aggregation-example",
            columnDefs=columnDefs,
            rowData=df.to_dict("records"),
            defaultColDef=dict(
                rowSelection="multiple",
                suppressAggFuncInHeader=True,
            ),
            dashGridOptions={"animateRows": False},
            enableEnterpriseModules=True,
            getRowStyle={
                "styleConditions": [
                    {
                        "condition": "params.node.aggData ? params.node.aggData.gold < 3 : false",
                        "style": {"backgroundColor": "silver"},
                    }
                ]
            },
        ),
    ]
)


if __name__ == "__main__":
    app.run(debug=True)