Unexpected result while creating a child_process

I am trying to call a function from an external file using child_process, but, it is returning to me an unexpected message and doesn’t even run the target function.

index.ts

import { fork } from 'child_process';

var cards = fork(`${__dirname}/workers/shuffleCards.js`, []);
cards.on("message", msg => { console.log(`Received message`, msg) });
cards.on("error", msg => { console.log(`Received error`, msg) });
cards.send("test");

shuffleCards.js

import cardShuffler from "../components/cardShuffler";

function shuffleCards() {
    const pid = process.pid;
    console.log(`Received process: ${pid}`);

    var action_cards = cardShuffler.shuffleActions();
    var property_cards = cardShuffler.shuffleProperties();
    var money_cards = cardShuffler.shuffleMoney();
    var rent_cards = cardShuffler.shuffleRent();
    var wild_cards = cardShuffler.shuffleWilds();

    var parsed_cards = [];
    [action_cards, property_cards, money_cards, rent_cards, wild_cards].map(card => {
        card.forEach(sub_card => {
            parsed_cards.push(sub_card)
        });
    });

    console.log(parsed_cards)

    return parsed_cards;
}

process.once("message", shuffleCards);

Message on console.log

Received message {
  compile: 'C:\Users\USER\source\repos\Will\src\components\cardShuffler.ts',
  compiledPath: 'C:\Users\USER\AppData\Local\Temp\.ts-nodeeyTUFf\compiled\src_components_cardShuffler_ts_7ae359b0420e1268f12c87be4bf028cb159f9cb115715422295351cb6494e318.js'
}

So it is returning me this compile and compiledPath message and it does not execute the shuffleCards() function