On top of the general failures from bug 206753 on iOS there are this two extra failures regarding WPT css-backgrounds tests: Regressions: Unexpected image-only failures (2) imported/w3c/web-platform-tests/css/css-backgrounds/background-image-centered-with-border-radius.html [ ImageOnlyFailure ] imported/w3c/web-platform-tests/css/css-backgrounds/box-shadow-body.html [ ImageOnlyFailure ]
imported/w3c/web-platform-tests/css/css-backgrounds/background-image-centered-with-border-radius.html fails with some faint lines. imported/w3c/web-platform-tests/css/css-backgrounds/box-shadow-body.html fails because the red rectangle is too thick.
WPT has removed the following tests as of 8f71659306c53f3cabad054ed02ac7c4d14de693: imported/w3c/web-platform-tests/css/css-backgrounds/box-shadow-body.html imported/w3c/web-platform-tests/css/css-backgrounds/background-image-centered-with-border-radius.html