[Webkit-unassigned] [Bug 237169] New: Inputs leave behind outline artifacts when repositioned in a grid

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=237169

            Bug ID: 237169
           Summary: Inputs leave behind outline artifacts when
                    repositioned in a grid
           Product: WebKit
           Version: Safari 15
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: natevw at yahoo.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 453158

  --> https://bugs.webkit.org/attachment.cgi?id=453158&action=review

simple HTML (+inline JS/CSS) repro of bug

When an input is repositioned within a grid layout e.g. from `grid-column: 1` to `grid-column: 3`, it "leaves behind" part of its top/bottom borders in the original location until something else triggers a more thorough repaint.

I did not try other scenarios [inputs moving in other types of layout, other types of elements moving in a grid layout…] but did distill the original issue we were seeing into a simple test case, attached.

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