[Webkit-unassigned] [Bug 187320] New: sticky positioned element is twitching within iframe

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187320

            Bug ID: 187320
           Summary: sticky positioned element is twitching within iframe
           Product: WebKit
           Version: Safari 11
          Hardware: iPhone / iPad
                OS: iOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mpcteam.kvet at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Steps to reproduce:
1. Open link: https://jsfiddle.net/19vjm4q7/7/
2. Scroll the table

Current behaviour:
Top row is twitching while scrolling.

Expected behaviour:
Top row should not twitch while scrolling.

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