It is excluding them right now, which is wrong: https://searchfox.org/wubkat/rev/03b3e7f3ada39b999913703406b57eb2b17208e4/Source/WebCore/css/parser/CSSPropertyParserHelpers.h#248
<rdar://problem/101461149>
Pull request: https://github.com/WebKit/WebKit/pull/5672
Committed 255875@main (817e48d20057): <https://commits.webkit.org/255875@main> Reviewed commits have been landed. Closing PR #5672 and removing active labels.