[Webkit-unassigned] [Bug 237077] New: mix-blend-mode renders incorrect color after the underlying layer's layout changed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=237077

            Bug ID: 237077
           Summary: mix-blend-mode renders incorrect color after the
                    underlying layer's layout changed
           Product: WebKit
           Version: Safari 15
          Hardware: Mac (Apple Silicon)
                OS: macOS 12
            Status: NEW
          Severity: Major
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: chu-vevo at outlook.com

I was building a website for a company and I use a layer with full-height linear-gradient plus mix blend mode to apply some change when scrolling. And I have this JS resize observer to change the CSS of the underlying layer once the window width-height ratio crossed 1:1. In Safari, this leads to muddy color rendering once the CSS changed, and it will stay that way until a page refresh. Please see the attachments for the description. And this is the website preview link, I'm authorized to file this bug using the link: https://62160a3454422e00075c955c--connect3-web.netlify.app

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