291434 2025-04-11 10:10:11 -0700 display: none on shadow DOM elements computed incorrectly 2025-07-29 07:51:02 -0700 1 1 1 Unclassified WebKit CSS Safari 18 Mac (Apple Silicon) macOS 15 NEW InRadar P2 Minor --- 148695 1 cluffpost webkit-unassigned cdumez cluffpost koivisto rniwa webkit-bug-importer oldest_to_newest 2110459 0 cluffpost 2025-04-11 10:10:11 -0700 Overview: Some selectors which result in an element toggling between `display: none` and `display: block` in the light DOM, do not render correctly once toggled to `display: block` and back to `display: none` in a shadow DOM. Reproduction/Demo: https://codepen.io/mattclough/pen/LEYwEmz Expected Results: Rendered elements with an active style rule `display: none` should always be hidden. Build Date & Hardware: Build 20621.1.15.11.10 on macOS Sequoia 15.4 (24E248) 2111826 1 webkit-bug-importer 2025-04-18 10:11:16 -0700 <rdar://problem/149558587>