Created attachment 451301 [details] Small reproduction The included test file contains an HTML element with the class "spoiler" and the following CSS: .spoiler:not(:hover) { filter: blur(10px); } The behavior I expected is that when hovering over the element, all traces of the blur will be removed and the unblurred text will become visible. The actual behavior I’m seeing is that while the portion of the page inside the element’s content rect is correctly updated, the portions of the blur that extend past the content rect remain visible.
<rdar://problem/88943473>