310874 2026-03-27 02:32:10 -0700 [threaded-animations] REGRESSION: animating to an implicit value for individual transform properties fails to animate 2026-03-31 01:14:33 -0700 1 1 1 Unclassified WebKit Animations WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://github.com/web-platform-tests/wpt/pull/58819 InRadar P2 Normal --- 1 graouts graouts graouts webkit-bug-importer oldest_to_newest 2194247 0 graouts 2026-03-27 02:32:10 -0700 A simple test such as this one: document.body.appendChild(document.createElement("div")).animate({ offset: 0, "translate": "0px 120px", opacity: 0 }, 1000); … crashes the UI process :( This used to work fine prior to threaded animations. 2194248 1 webkit-bug-importer 2026-03-27 02:32:30 -0700 <rdar://problem/173487467> 2194249 2 graouts 2026-03-27 02:34:42 -0700 Sorry, not a crash, just a behavior failure. 2194256 3 graouts 2026-03-27 02:42:01 -0700 Pull request: https://github.com/WebKit/WebKit/pull/61481 2194389 4 graouts 2026-03-27 11:04:45 -0700 Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/58819 2194644 5 ews-feeder 2026-03-28 01:26:00 -0700 Committed 310146@main (8f4c548a8aaf): <https://commits.webkit.org/310146@main> Reviewed commits have been landed. Closing PR #61481 and removing active labels. 2195463 6 ews-feeder 2026-03-31 01:14:33 -0700 Committed 305413.600@safari-7624-branch (e79e52d7afae): <https://commits.webkit.org/305413.600@safari-7624-branch> Reviewed commits have been landed. Closing PR #4853 and removing active labels.