`instant.preview` is not working properly

[Xiaokang2022]

Context

No response

Bug description

My configuration is as follows:

site_name: My Docs
site_url: https://example.com

markdown_extensions:
  - attr_list

theme:
  name: material
  features:
    - navigation.instant.preview

And the content of my index.md is as follows:

# Welcome to MkDocs

For full documentation visit [mkdocs.org](https://www.mkdocs.org).

## 命令

* `mkdocs new [dir-name]` - Create a new project.
* `mkdocs serve` - Start the live-reloading docs server.
* `mkdocs build` - Build the documentation site.
* `mkdocs -h` - Print help message and exit.

## Project layout

    mkdocs.yml    # The configuration file.
    docs/
        index.md  # The documentation homepage.
        ...       # Other markdown pages, images and other files.

[Link1](#命令){data-preview}

[Link2](#project-layout){data-preview}

The actual effect is that instant.preview on Link2 works normally, while instant.preview on Link1 does not.

This situation occurs not only with mkdocs-material, but also with zensical.

Related links

• Reporting a bug
• Instant previews

Reproduction

9.7.0-instant-preview-bug.zip

Steps to reproduce

1. mkdocs serve or zensical serve
2. Move the mouse over the two links to see the effect

Browser

No response

Before submitting

• I have read and followed the bug reporting guidelines.
• I have attached links to the documentation, and possibly related issues and discussions.
• I assure that I have removed all customizations before submitting this bug report.
• I have attached a .zip file with a minimal reproduction using the built-in info plugin.