How to reproduce :

• create a list with 3 levels like this :

  <ul>
    <li>First level</li>
    <li>first level
      <ul>
        <li>second level
          <ul>
            <li>thirs level</li>
          </ul>
        </li>
      </ul>
    </li>
  </ul>
  

• Then go to the second level and retro grade to the previous level
  > the <li> tag of the item is replaced by 2 <br> tags.

  <ul>
    <li>First level</li>
    <li>first level
      <br><br>second level
      <ul>
        <li>thirs level</li>
      </ul>
    </li>
  </ul>
  

The <li> of the element should not desapears but only go to the previous <ul> tag.

This was the inline editor behavior of the 3.7 version of the CMS.