[Webkit-unassigned] [Bug 253503] REGRESSION: Top bar is jumpy and glitchy on scmp.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=253503

--- Comment #7 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
I think we need to educate the scrolling tree about fixed elements that don’t behave like fixed (because of an ancestor transform), but whose containing block is still the viewport.

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