We're currently failing to do layouts when the transform on a composited layer changes. This means that we fail to recompute overflow.
Created attachment 133381 [details] Testcase
<rdar://problem/11104524>
Created attachment 470888 [details] Chrome, Safari & Firefox - Video Reference I am able to reproduce this bug in Safari Technology Preview 192 and the comparison between all browser can be seen with Chrome Canary 125 and Firefox Nightly 126.