Lead section name conflict when there's already a section named "Introduction"
It's nice that the first (zeroth) section of an article is automatically assigned an entry in the table of contents, called "Introduction". However, in articles where there is an explicit section called "Introduction" (e.g. https://www.wikiwand.com/en/Riemannian_geometry) two entries appear in the ToC named "Introduction".
Perhaps naming the link "[top] or something similar may avoid such conflicts?