The frame is position: relative — the anchor the badge measures from. Remove the frame's position and predict where the badge re-anchors (answer: the nearest positioned ancestor, ultimately the page).
position: relative, top: -1.25rem — drawn upward, but the space it left behind is still reserved. Scroll to see the next panel.
position: sticky, top: 0 — scroll this panel's container: the heading pins to the top edge, then releases.
Scrolling content above the sticky trap.
More content so the sticky behavior is visible.