[Webkit-unassigned] [Bug 190144] New: [iOS] Corrupted rendering with brightness filter

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190144

            Bug ID: 190144
           Summary: [iOS] Corrupted rendering with brightness filter
           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: ajuma at chromium.org
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 351265

  --> https://bugs.webkit.org/attachment.cgi?id=351265&action=review

Test case

Steps to reproduce:
1) Open the attached page, zoom in and scroll.
2) Open a new tab.
3) Go back to the first tab and scroll.
4) Observe that parts of the page are rendered in seemingly-random positions.

Sometimes steps (2) and (3) need to be repeated a few times.

I've only managed to reproduce this on-device (iPhone 7 and iPhone XS), not in the simulator.

This was originally reported as a Chrome for iOS bug (https://bugs.chromium.org/p/chromium/issues/detail?id=885323), but it reproduces in Safari as well.

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