212534 2020-05-29 11:08:01 -0700 Event regions are wrong in the scrolled contents layer 2020-05-29 14:32:43 -0700 1 1 1 Unclassified WebKit UI Events Safari Technology Preview Unspecified Unspecified NEW https://bugs.webkit.org/show_bug.cgi?id=212545 P2 Normal --- 1 simon.fraser webkit-unassigned dbates koivisto simon.fraser oldest_to_newest 1657345 0 simon.fraser 2020-05-29 11:08:01 -0700 The event region in the scrolled contents layer covers only the visible part, meaning that if you swipe then tap before we've done layout/rendering update, you get the wrong region types. RenderBlock::paintObject() uses: auto borderRect = LayoutRect(paintOffset, size()); which is obviously wrong for the contents of scrolled overflow.