[Webkit-unassigned] [Bug 211841] New: Disappearing elements after animation ends

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211841

            Bug ID: 211841
           Summary: Disappearing elements after animation ends
           Product: WebKit
           Version: Safari 13
          Hardware: All
                OS: Unspecified
            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 399258

  --> https://bugs.webkit.org/attachment.cgi?id=399258&action=review

Screen recording - OSX

When you check the following example in Safari 13, the elements on the bottom animated slider disappears periodically. This disappear happens only when: The top image scaled, the bottom slider has negative margin-top so it overlays the top and only when the bottom slider does not have transform.

https://smartslider3.com/bugs/webkit/disappear/

It happens both on iPhone Safari 13.4.1 and OSX Safari 13.1. And seems like this bug is fixed in the OSX Technology Preview. Release 105 (Safari 13.2, WebKit 15610.1.10)

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