We are failing to update styles on a parent element with a transition for a custom property when querying the computed style for a child element's property using that custom property with a var().
<rdar://problem/103549960>
Pull request: https://github.com/WebKit/WebKit/pull/8391
Committed 258714@main (e72cc2771777): <https://commits.webkit.org/258714@main> Reviewed commits have been landed. Closing PR #8391 and removing active labels.