225207 2021-04-29 13:34:54 -0700 Regression: animation on pseudo element ruins flex layout 2021-05-02 04:33:07 -0700 1 1 1 Unclassified WebKit CSS Safari 14 iPhone / iPad iOS 14 RESOLVED DUPLICATE 223990 InRadar P2 Normal --- 1 spam webkit-unassigned graouts simon.fraser webkit-bug-importer zalan oldest_to_newest 1755515 0 spam 2021-04-29 13:34:54 -0700 Css transition on some border property of pseudo element (eg. border-color or border-width) results in ruined flex layout. Behavior documented in codepen: https://codepen.io/t100/pen/mdRYXZw (clicking on label should not change elements arrangement, unfortunately that's not true for Safari and Chrome on iOS 14.5). 1755999 1 webkit-bug-importer 2021-05-01 14:35:34 -0700 <rdar://problem/77422521> 1756035 2 graouts 2021-05-02 03:45:42 -0700 This appears to be already fixed on ToT. 1756037 3 graouts 2021-05-02 04:31:17 -0700 This was fixed in r275277 for bug 223990. *** This bug has been marked as a duplicate of bug 223990 *** 1756039 4 graouts 2021-05-02 04:33:07 -0700 This should be fixed in the existing iOS 14.6 beta or an upcoming one.