This sampler keeps a dialog open with a scroll-snapping carousel. The carousel defines anchor-name: --carousel. At viewport widths of at least 600px, its ::scroll-button() pseudo-elements switch to position: fixed and position-anchor: --carousel.
Expected: after resizing wide -> narrow -> wide, the left and right scroll buttons appear next to the carousel again.
Observed in the local regression test: after the second wide resize, the right scroll button no longer hit-tests at the carousel inline end.