[Webkit-unassigned] [Bug 204605] New: Flashing and partly visible elements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204605

            Bug ID: 204605
           Summary: Flashing and partly visible elements
           Product: WebKit
           Version: Safari 13
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: roland at nextendweb.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 384339

  --> https://bugs.webkit.org/attachment.cgi?id=384339&action=review

Test

Elements are flashing or become partly rendered after transform change. 

Reproduce:

1. Open in Safari on iPad or iPhone: https://smartslider3.com/bugs/webkit/flashing/
2. Swipe left on the two small image
3. It starts to amimate and the elements are flashing and end up being partly visible.

Screen capture: https://www.youtube.com/watch?v=FizN0noXky0

Attached the source code for testing.

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