[Webkit-unassigned] [Bug 231953] Element with position: sticky after sticking, starts to move incorrectly when scrolling

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231953

--- Comment #14 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
I believe the issue here is that in a given scrolling tree commit, we update the scrolling node for the overflow scroll with a new scroll position, but fail to update the sticky viewport constraints on the sticky node, so that "last committed scroll position" on the scrolling node, and "constraining-rect-at-last-layout" on the sticky node get out of sync.

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