Code in MDX Stories that are not one-liners does not load the story in storybook

[wiktoriavh]

Describe the bug
Writing a story like this does not work

<Canvas>
  <Story name="Dialog">
    {() => {
      const { setState } = useDialogContext();
      const handleClick = () => {
        setState(true);
      };

      return (
        <div>
          <button onClick={handleClick}>Open Dialog</button>
          <MyDialog />
        </div>
      );
    }}
  </Story>
</Canvas>

But writing it like this, as a one-liner, works.

<Canvas>
  <Story name="Dialog">
    {() => {
      const { setState } = useDialogContext();
      const handleClick = () => setState(true);
      return (
        <div>
          <button onClick={handleClick}>Open Dialog</button>
          <MyDialog />
        </div>
      );
    }}
  </Story>
</Canvas>

To Reproduce
https://github.com/Braweria/sb-mdx-story-issue
Clone the repo, go to Dialog.stories.mdx and change handleClick to be on several lines, then the story will no longer load.

System

Environment Info:

  System:
    OS: Windows 10 10.0.19043
    CPU: (12) x64 Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
  Binaries:
    Node: 14.15.4 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.10 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 6.14.10 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 95.0.4638.69
    Edge: Spartan (44.19041.1266.0), Chromium (95.0.1020.44)
  npmPackages:
    @storybook/addon-actions: ^6.3.12 => 6.3.12
    @storybook/addon-essentials: ^6.3.12 => 6.3.12
    @storybook/addon-links: ^6.3.12 => 6.3.12
    @storybook/node-logger: ^6.3.12 => 6.3.12
    @storybook/preset-create-react-app: ^3.2.0 => 3.2.0
    @storybook/react: ^6.3.12 => 6.3.12

Additional context
Written in MDX.
Video: https://www.loom.com/share/3313b001c2814d668abe1411d131010b
Edit: There is actually a mistake in the video where copilot filled it out as setState(!state) instead of setState(true), but regardless of that, the issue is still there.

[shilman]

Try removing the newline here:

      };

      return (

[shilman]

closing as dupe to #7902