[Webkit-unassigned] [Bug 274831] New: [macOS] Safari flashes a page background colored bar with top content inset dimensions in footer when window resizing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=274831

            Bug ID: 274831
           Summary: [macOS] Safari flashes a page background colored bar
                    with top content inset dimensions in footer when
                    window resizing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: a_protyasha at apple.com
                CC: a_protyasha at apple.com, bfulgham at webkit.org,
                    simon.fraser at apple.com,
                    webkit-bug-importer at group.apple.com, zalan at apple.com

Go to any web page with a non-white background color, and make the Safari window small. Then, double tap on the top bar of the Safari window to have it snap to its full size. You will see that there is a difference between the void space horizontally vs vertically during resize. Horizontally we see white, while vertically we see white as well, but before that we see an unexpected bar that shares color with the current page's background, and is only as big as the top content inset.

I reproduced on https://smfr.org.

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