corner-shape: bevel; child image covers the border

All three cards use border-radius: 24px; border: 4px solid; and contain a square-cornered image.

Left (corner-shape: bevel, no clip): the image's square corners paint over the bevel border diagonals and overhang the card outline. This is the reported "hidden top borders".

Middle (default round corners, no clip): the exact same overlap happens, just shallower -- the long-standing behavior of every browser since border-radius shipped.

Right (bevel + overflow: hidden): the image is clipped to the beveled shape.

Per css-backgrounds-3 §5.3, the corner curve clips only the element's own background and border -- descendants are clipped only when overflow is not visible. A pixel diff confirms the border paints identically with and without the clip. Not a Blink bug; author fix is overflow: hidden or clip.