[Bug] The editor doesn‘t show suggestion in typescript union type?

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.52.0#XQAAAAKDAQAAAAAAAABBqQkHQ5NjdMjwa-jY7SIQ9S7DNlzs5W-mwj0fe1ZCDRFc9ws9XQE0SJE1jc2VKxhaLFIw9vEWSxW3yscwzlSNRgmSaumWUF-TBOsVJ4S4FwfCDQb5-2uUHXTVAefbVSd9IzaZ_vv9VR9KugsKi2HE8Ay7rYVRaT2AP-CadfxsBdokdahIviAi93MvwDF8b8XzkHuPNdCeZ5V8z9Em0IF7Ime8PbjsLEXQErPNjSpZry7LzgeDlhlOBzl4ty_FzgYQpdDDexChD9jt-N3JctaRk3fPHTikfdD41FBQwZv96MeWPJbJ0ItHH7JAo3i-SjpeQMt8qlzXXQjBhclh4OjmfxWs9d4FcDHVX-x5MG4bRkcPpTadr1IRLutJ0t46xl9dA64wQTU5TApHEzSf_6gt5LA

Monaco Editor Playground Code

const value = /* set from `myEditor.getModel()`: */ `type CarBrand = "Toyota" | "BMW" | "Mercedes" | "Audi";

const car: CarBrand = ""`;

// Hover on each property to see its docs!
const myEditor = monaco.editor.create(document.getElementById("container"), {
	value,
	language: "typescript",
	automaticLayout: true,
});

Reproduction Steps

Open playground url, and input const car: CarBrand = ""

Actual (Problematic) Behavior

After input double quotes, the editor doesn't show suggestion like vscode.dev

Expected Behavior

I want that the editor can show suggestion like vscode.dev after input double quotes.

Additional Context

No response

Start with the linked Monaco Editor Playground and its TypeScript example, then compare completion behavior there with vscode.dev after entering the union-typed string. The issue names no repository file or test entry point, so trace the playground's suggestion path and identify how the expected suggestions are produced. Done means suggestions appear after entering the opening double quote for the shown CarBrand union.