Created attachment 387220 [details] Test expected result vs actual result The test is failing since async scrolling was enabled in r250651.
Weird, async scrolling shouldn't affect GTK unless AC mode is forced, which is not the case of layout tests.
This test is passing since 275045@main ([GTK] Enable `forceCompositingMode` by default). https://results.webkit.org/?platform=GTK&suite=layout-tests&test=compositing%2Fclipping%2Fborder-radius-async-overflow-non-stacking.html After updating test expectations in 279290@main, there are no more tests referring to this bug. Closing bug.