After modifying the two-level title of the first line of the about.md file, the link "about" in the navigation disappears

[pf.z]

When modifying the first line of the about.md file(as follows):

# About

Modified to

# About me

the link "about" in the navigation disappears.

If you revise #About me in about.md to #About, then the link "about" in the navigation will appear.

[Jeremy Howard]

Thanks for the issue. The best place for this is at the repo for the template responsible: https://github.com/jekyll/minima