I'm new to Plotly and I'm trying to do a very simple PoC to update a plot in real-time based on SignalR (WebSocket) events.

I have the following in a Pen that works just fine:

var data = [
  {
    x: ['giraffes', 'orangutans', 'monkeys'],
    y: [20, 14, 23],
    type: 'bar'
  }
];


Plotly.newPlot('myDiv', data);

setTimeout(() => {
  const newData = "\"1,2,3\""; // data is received like this in SignalR
  
  const data = newData.replace(/"/g,"");
  const result = [data.split(',')];
  
  Plotly.restyle('myDiv', 'y', result);
}, 2000);

I'm trying now to get it to work in a Vue+SignalR context:

const plotData = [
    {
        x: ['giraffes', 'orangutans', 'monkeys'],
        y: [1, 1, 1],
        type: 'bar'
    }
];
Plotly.react('testplot', plotData);
const app = new Vue({
    el: '#app',
    data: data,
    methods: { ... }
);

//...

const connection = new signalR.HubConnectionBuilder()
    .withUrl(apiBaseUrl + '/api', {
        accessTokenFactory: () => {
            return generateAccessToken(data.username)
        }
    })
    .configureLogging(signalR.LogLevel.Information)
    .build();
connection.on('newMessage', onNewMessage);
//...

function onNewMessage(message) {
    const data = message.Text.replace(/"/g, "");
    const result = [data.split(',')];

    Plotly.restyle('testplot', 'y', result); --> error here
};

The result I'm passing to restyle is the same as in the Pen, [['1', '2', '3']].

The error thrown is:

Uncaught TypeError: Cannot read properties of undefined (reading 'map')
    at Object.r.coerceTraceIndices (plotly-2.4.2.min.js:58)
    at Object.D [as restyle] (plotly-2.4.2.min.js:58)
    at HubConnection.onNewMessage (index:207)
    at HubConnection.ts:367
    at Array.forEach (<anonymous>)
    at HubConnection.invokeClientMethod (HubConnection.ts:367)
    at HubConnection.processIncomingData (HubConnection.ts:297)
    at WebSocketTransport.HubConnection.connection.onreceive (HubConnection.ts:54)
    at WebSocket.webSocket.onmessage (WebSocketTransport.ts:56)

I cannot find anything online to tell me what could cause the error. I'm using plotly-2.4.2.min.js in both cases and have tried other versions with the same result. The error comes from the HTMLElement losing its data attribute for some reason.