[Webkit-unassigned] [Bug 242374] New: [iPadOS] (Trackpad) Scroll horizontally by trackpad trigger html page scroll unexpected

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=242374

            Bug ID: 242374
           Summary: [iPadOS] (Trackpad) Scroll horizontally by trackpad
                    trigger html page scroll unexpected
           Product: WebKit
           Version: Safari 15
          Hardware: iPhone / iPad
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cuppi413 at gmail.com
                CC: simon.fraser at apple.com

Created attachment 460706

  --> https://bugs.webkit.org/attachment.cgi?id=460706&action=review

The attachment is the minimum Demo of this problem

When there are two nested scrolling container，and the inner container can scroll horizontally and the CSS attributes overflow-y is hidden, the outer container can scroll vertically
when set position:relative to any element between inner container and outer container,
trackpad is connected on ipad and I scroll by touchpad, the behavior is expected when trackpad pointer is outside inner container, but when trackpad pointer is inside inner container, it will trigger the HTML page to scroll.

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