The following WPT fails: imported/w3c/web-platform-tests/css/css-flexbox/scrollbars-no-margin.html https://wpt.fyi/results/css/css-flexbox/scrollbars-no-margin.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&q=label%3Ainterop-2021-flexbox
<rdar://problem/94160034>