Maps are not properly displayed on typescript playground

[corollari]

This issue isn't related to the typescript compiler but to the playground present on typescript.org, which, according to #2246 and #17677, implements an instance of monaco-editor. I've opened this issue in this repository instead of the monaco-editor one because it seems that the problem is caused by the extensions to monaco-editor that have been added to build the playground. Feel free to close this issue if I'm mistaken.

TypeScript Version: 3.8.3

Search Terms:
Map console.log playground

Expected behavior:
The standard representation of the Map object Map { 1 => 32 } is printed on the console.log call.

Actual behavior:
An empty object {} is printed on the console.log call.

Related Issues:
There's an stackoverflow question from 2017 which complains about the same behaviour on a repl.it environment

Code

let m = new Map<number,number>()
m.set(1,32)
console.log(m)

Output

"use strict";
let m = new Map();
m.set(1, 32);
console.log(m);

Compiler Options

{
  "compilerOptions": {
    "noImplicitAny": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "strictBindCallApply": true,
    "noImplicitThis": true,
    "noImplicitReturns": true,
    "alwaysStrict": true,
    "esModuleInterop": true,
    "declaration": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "moduleResolution": 2,
    "target": "ES2017",
    "jsx": "React",
    "module": "ESNext"
  }
}

Playground Link: Provided

[j-oliveras]

I see the expected behavior using Firefox.

[corollari]

I've just tested it on both Firefox 75.0 and Chromium 81.0.4044.122 and have been able to reproduce the issue on the two of them. It must be noted that I'm referring to the Logs pane that is on the right side of the playground: