321268 2026-08-07 03:15:21 -0700 height: fit-content is broken when position: fixed is used 2026-08-07 18:06:12 -0700 1 1 1 Unclassified WebKit Layout and Rendering Safari 26 Unspecified Unspecified RESOLVED DUPLICATE 289876 InRadar P2 Normal --- 1 alexander webkit-unassigned bfulgham simon.fraser webkit-bug-importer zalan oldest_to_newest 2238257 0 alexander 2026-08-07 03:15:21 -0700 Create this layout: <section> I am some real content <div></div> </section> Apply these styles: section { height: fit-content; } div { height: 100%; } Everything works as expected. Now add "position: fixed" to section and its height becomes double the size because DIV adds another 100% of the height. Works properly in all other browsers, but Safari, see this Codepen: https://codepen.io/waterplea/pen/KwaEgJE 2238516 1 webkit-bug-importer 2026-08-07 17:23:19 -0700 <rdar://problem/184375810> 2238518 2 zalan 2026-08-07 17:30:57 -0700 Thank you for filing this bug report. I think it has already progressed on trunk. Let me find the progression point. 2238524 3 zalan 2026-08-07 18:06:12 -0700 Progressed at https://commits.webkit.org/311084@main. *** This bug has been marked as a duplicate of bug 289876 ***