Cosmetic problem navigation tree (entries are not aligned with bullet points)

When using the dynamic navigation tree (15.5 default) we observe entries that do not start next to the bullet point at the children level. This is not a good look and probably a CSS issue? You can reproduce the effect with this link: Database Schema ( where it is not clear why there is no suitable word wrap in the marked cases:


Or is this related to a property in the corresponding headings (e.g. non-breaking-spaces)? Thanks!