[Webkit-unassigned] [Bug 158181] New: -webkit-backdrop-filter blur rendering issue with css animation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=158181

            Bug ID: 158181
           Summary: -webkit-backdrop-filter blur rendering issue with css
                    animation
    Classification: Unclassified
           Product: WebKit
           Version: Safari 9
          Hardware: Macintosh
                OS: OS X 10.11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ldebeasi at gmail.com
                CC: dino at apple.com

Created attachment 280040
  --> https://bugs.webkit.org/attachment.cgi?id=280040&action=review
Source code

Given a container of width < 100%, an overlay with -webkit-backdrop-filter: blur() applied, and an element underneath the overlay with a CSS animation applied, triggering that animation causes rendering distortion to occur. While this issue can be reproduced when other backdrop-filters are applied, it is most prominent with blur().

Example: http://liamdbz.com/webkit
Source files with reproduction attached.

OS: OS X 10.11.5
Safari: 9.1.1

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