[Webkit-unassigned] [Bug 217476] New: [GTK][Stable] WebKitGTK backdrop filter rendering issues (leaking and inconsistent)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217476

            Bug ID: 217476
           Summary: [GTK][Stable] WebKitGTK backdrop filter rendering
                    issues (leaking and inconsistent)
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: contact+bugs.webkit.org at hacktivis.me
                CC: bugs-noreply at webkitgtk.org

On <https://hacktivis.me/tmp/webkit-backdrop-filter-header.xhtml> (page that I created to show a bug that I noticed while tweaking a frontend) you have the box-shadow creating a blur, while this behaviour isn't the one you get in chromium or firefox. You can also notice that the text on the top edge is less blurred out as it becomes slightly legible.
Which is also quite noticeable on <https://webkit.org/demos/backdrop-filter/> as I can distinguish the window on the houses while for the rest you can't even guess that they are houses.

On <https://misskey.io/@syuilo> you can see that about 1/4 of the page is blurred out while it should only apply to under the navigation header.

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