239357 2022-04-14 15:43:53 -0700 Element with "position: sticky" doesn't stick if parent element has "contain: paint" 2022-04-14 19:29:06 -0700 1 1 1 Unclassified WebKit CSS Safari 15 Mac (Intel) macOS 12 RESOLVED DUPLICATE 238016 P2 Minor --- 1 danilu webkit-unassigned simon.fraser oldest_to_newest 1861651 0 danilu 2022-04-14 15:43:53 -0700 Reproduction Steps: 1. Go to https://codepen.io/dl1644/pen/zYpmLpd in Safari 15.4 (macOS 12.3.1) 2. Attempt to scroll the green/yellow/red div to the right 3. Note that the green "sticky" div is scrolled out of view 4. Repeat steps 1 and 2 in Chrome(100) and Firefox (99). Note that the green "sticky" div stays in view 5. Return to your Safari codepen tab and remove "contain: paint" from the "#row" CSS 6. Attempt to scroll the green/yellow/red div. Note that the green "sticky" div stays in view now but the yellow "float" div now spills out the bottom of the red div Started occurring with Safari 15.4 from what I can tell. Unsure if this counts as a regression since "contains" is newly supported in Safari 15.4 but the sticky behavior worked just fine in at least Safari 14 and below. 1861690 1 simon.fraser 2022-04-14 19:29:06 -0700 *** This bug has been marked as a duplicate of bug 238016 ***