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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Element disappears when applying a translate3d within translate3d"
   href="https://bugs.webkit.org/show_bug.cgi?id=183003">183003</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Element disappears when applying a translate3d within translate3d
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>Safari 11
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>OS X 10.11
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Animations
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>atrigol@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dino@apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=334381" name="attach_334381" title="Video of the issue">attachment 334381</a> <a href="attachment.cgi?id=334381&action=edit" title="Video of the issue">[details]</a></span>
Video of the issue

I noticed that in Safari (working fine in Chrome and Firefox), an element with a translate3d transition disappears on the screen when applying it within another element that also contains a translate3d transition.

Reproduction here:
<a href="https://jsfiddle.net/chq2qfm8/63/">https://jsfiddle.net/chq2qfm8/63/</a>


Steps to reproduce:

- Click the Scroll Down and Scroll Up buttons consecutively just after the animation finishes. 

Video attached, yo ucan also find it here:
<a href="https://image.ibb.co/hVPrYH/animation2.gif">https://image.ibb.co/hVPrYH/animation2.gif</a></pre>
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