Markdown: Shell fenced code block have incorrect syntax highlighting after indent

[alexr00]

I created a sh sample code with some comments inside a fenced code block, place it after an list item and then indent it.
If I indent the code block, the syntax highlighting loses its color.
The bug is in the markdown editor and preview.

Does this issue occur when all extensions are disabled?: YES

Basic Information

• VS Code Version: 1.77.3 (user setup)
• OS Version: Windows_NT x64 10.0.19045
• Color Theme: Dark+ (default dark)

Steps to Reproduce:

1. Open markdown file
2. Create list
3. Add a code block (see sample code below)
4. See the result (see screenshots below)

Sample Code

1. List One

```sh
sudo apt-get purge --autoremove -y google-chrome-stable

# with alias
remove -y google-chrome-stable
```

1. List Two

    ```sh
    sudo apt-get purge --autoremove -y google-chrome-stable

    # with alias
    remove -y google-chrome-stable
    ```

1. List Three

    ```sh
        sudo apt-get purge --autoremove -y google-chrome-stable

        # with alias
        remove -y google-chrome-stable
    ```

Screenshots

Actual behavior

Expected behavior

Originally from @adorade in microsoft/vscode#180246

[patrickwalton]

Any progress on this?