A component that renders a list, such as FeatureGrid, passes each item
into a child: title={item.title || item.label || "Feature"}. The
compiler decided whether that attribute needed a client binding by
searching the expression for each prop name, so `item.label` matched the
grid's own `label` prop and a binding was emitted.
On hydration the binding is re-evaluated where the loop item is out of
scope, so the expression fell through to its default and replaced the
server's value: every card's title became "Feature". A name after a dot
belongs to whatever precedes it, so it no longer counts as a reference.
Timeline headings follow the same idea: its items were always h4, which
skipped a level and broke the heading order of a page that gives the
timeline no title of its own. They now take h3 in that case.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>