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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Toggling backdrop-filter styles on position:fixed element with background-color does not work"
   href="https://bugs.webkit.org/show_bug.cgi?id=159573">159573</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Toggling backdrop-filter styles on position:fixed element with background-color does not work
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </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>Layout and Rendering
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>joepeck&#64;webkit.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dcrousso+webkit&#64;gmail.com, dino&#64;apple.com, graouts&#64;apple.com, simon.fraser&#64;apple.com
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        </tr></table>
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        <pre>Created <span class=""><a href="attachment.cgi?id=283187" name="attach_283187" title="[REDUCTION] Test Case">attachment 283187</a> <a href="attachment.cgi?id=283187&amp;action=edit" title="[REDUCTION] Test Case">[details]</a></span>
[REDUCTION] Test Case

Summary:
Toggling backdrop-filter styles on position:fixed element with background-color does not work

Steps to Reproduce:
1. Open attached reduction
2. Click &quot;Blur none&quot; to toggle off the backdrop-filter
3. Click &quot;Blur 50&quot; to toggle on the backdrop-filter (back to the original value)
  =&gt; nothing happened, expected this to re-add a backdrop-filter</pre>
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