As part of https://bugs.webkit.org/show_bug.cgi?id=203291 we added two new WPT tests imported/w3c/web-platform-tests/css/css-animations/animation-opacity-pause-and-set-time.html and imported/w3c/web-platform-tests/css/css-animations/animation-transform-pause-and-set-time.html that are ImageOnlyFailure on WK1 only.
Marked test as failing as part of https://trac.webkit.org/changeset/251597/webkit