[BUG] Links fail once the document structure is changed.

[Vivian2022]

Describe the bug
Links fail once the structure of the linked document is changed.

Environment

• OS: Windows 10
• VSCode: 1.85.1
• Markdown Preview Enhanced: 0.8.0

To Reproduce
Steps to reproduce the behavior:

1. Create a link to a section header within the same document or in another document.
2. Change the structure of the linked document. For example, add a new chapter before the linked section.
3. Click the link again.
4. The link fails, and the linked-to section can't be found.

Expected behavior
The previous link still works once the structure of the linked-to document is changed.

Markdown file
See the attached files.

Screenshots
None

Additional context
None