This page sits exactly where Three Levels Deep sits — three crumbs’ worth of ancestry — but sets showBreadCrumbs = false in its front matter, so there is nothing above the title.
The flag does both halves. It hides the visible trail and suppresses the BreadcrumbList JSON-LD, so the markup never describes navigation a visitor cannot see. Before v0.5.0 the structured data ignored the flag entirely and a page like this still claimed a trail.
Set it per page in front matter, as here, or site-wide in hugo.toml under [params].