Cannot use ".d.ts" file on non-relative import with `rootDirs` and `baseUrl`

Bug Report

🔎 Search Terms

baseUrl rootDirs non-relative module .d.ts

🕗 Version & Regression Information

• This is the behavior in every version I tried : 5.1.3 and 4.9.5.

⏯ Playground Link

Playground link with relevant code

💻 Code

// tsconfig.json
{
  "compilerOptions": {
    "baseUrl": "./src",
    "rootDirs": [".", "generated"],
  }
}

// src/index.ts
import stylesA from "css/a.module.scss" // 👎 Cannot find module 'css/a.module.scss' or its corresponding type declarations.ts(2307)
import stylesB from "./css/b.module.scss" // 👍

console.log(stylesA, stylesB)

// src/css/a.module.scss
.a {
    color: red;
}

// src/css/b.module.scss
.b {
    color: red;
}

// generated/src/css/a.module.scss.d.ts
export type Styles = {
  'a': string;
};

declare const styles: Styles;

export default styles;

// generated/src/css/b.module.scss.d.ts
export type Styles = {
  'b': string;
};

declare const styles: Styles;

export default styles;

🙁 Actual behavior

On first import in index.ts, the ".d.ts" file is not found: "Cannot find module 'css/a.module.scss' or its corresponding type declarations.ts(2307)"
On the second one, the ".d.ts" file is found and types are displayed correctly.

🙂 Expected behavior

Whenever it's a non-relative import (thanks to the baseUrl option) or a relative import, it should find the ".d.ts" file because of the rootDirs settings.