[node:worker_threads] The behavior of MessagePort.on() differs between Deno and Node.js

[mys1024]

Version: Deno 1.42.4, Node.js 20.11.1

The behavior of MessagePort.on() differs between Deno and Node.js with the following code:

import { MessageChannel } from "node:worker_threads";

const { port1, port2 } = new MessageChannel();

port1.on("message", (msg) => console.log("listener1", msg));
port1.on("message", (msg) => console.log("listener2", msg));

port2.postMessage("hi!");

In Node.js, it prints:

listener1 hi!
listener2 hi!

In Deno, however, it only prints:

listener2 hi!