See https://github.com/w3c/csswg-drafts/issues/9619
<rdar://problem/118765970>
Pull request: https://github.com/WebKit/WebKit/pull/20884
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/43349
Committed 271108@main (bfbb1bbdc47a): <https://commits.webkit.org/271108@main> Reviewed commits have been landed. Closing PR #20884 and removing active labels.