<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Position fixed is buggy with overflow:auto scrolling"
   href="https://bugs.webkit.org/show_bug.cgi?id=154399">154399</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Position fixed is buggy with overflow:auto scrolling
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Safari 9
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>iOS
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>iOS 9.3
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Major
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>dvoytenko&#64;google.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>To reproduce:

1. Open <a href="http://output.jsbin.com/nayoxe/quiet">http://output.jsbin.com/nayoxe/quiet</a> on iOS
2. Try to scroll fast

Observe:

Top and bottom elements styled with `position:fixed` jump and flicker.

Expected:

`position:fixed` elements should stay put.

Description:

This is a somewhat specific example. It's uses `overflow:auto` scrolling inside of an iframed document, which is a workaround for the fact that iOS doesn't allow iframes to scroll.

Source code: <a href="http://jsbin.com/nayoxe/edit?html,css,output">http://jsbin.com/nayoxe/edit?html,css,output</a>

Please advise.</pre>
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