imported/w3c/web-platform-tests/css/css-fonts/font-feature-settings-tibetan.html is a constant Image Failure on BigSur on Intel Macs only. HISTORY: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-fonts%2Ffont-feature-settings-tibetan.html It looks like the expectations was set to Pass ImageOnlyFailure, but the expectation was removed at r275926: https://trac.webkit.org/changeset/275926/webkit I've attached the Expected, Actual, and Diff Images to this bug below.
Created attachment 426152 [details] Expected, Actual, and Diff Images for failing test. Attaching images to bug.
<rdar://problem/76730038>