Bug: A combination of bold and bold-italic text on the same line is incorrectly converted to Markdown and back.

[insektary]

I use the Lexical Editor, which exports and imports Markdown using built-in tools. The bug can be reproduced in the lexical/playground sandbox; detailed steps are below

Lexical version: 0.38.2

Steps To Reproduce

1. Open the lexical/playground project and the Editor.tsx file
2. Add imports $convertToMarkdownString and TRANSFORMERS from @lexical/markdown
3. Add import OnChangePlugin from @lexical/react/LexicalOnChangePlugin
4. Add <OnChangePlugin onChange={onChange} /> to editor code and create the next onChange handler:

  const onChange = (editorState) => {
    const markdown = editorState.read(() =>
      $convertToMarkdownString(TRANSFORMERS)
    )
    console.log(markdown)
  }

5. Run the project, clear editor input and type next subsequence: press Bold => type '123' => press Italic => type '456' (Result: 123456 - a string without spaces, the first three characters are bold, the next three are bold and italicized). Log and copy converted to markdown result - should be **123*456*** string
6. Go to App.tsx and initialize the editor with a value converted from this string:

      defineExtension({
        $initialEditorState: () => $convertFromMarkdownString('**123*456***', TRANSFORMERS)

7. Check the results

The current behavior

The editor displays a distorted string 123*456* (See screenshot):

The expected behavior

The editor displays the same string we entered in step 5: 123456

[psaurer-prodyna]

I have the same issue. It's even reproducible in the online playground, when you switch to raw markdown and back, the output is 123*456*