line break inside a list item generates space between the lines

This is a simple solution…

by adding a <br/><br/> in your <li> will add a blank line break directly underneath

<ul>
    <li>Line 1<br/><br/></li>
    <li>Line 2</li>
    <li>Line 3</li>
    <li>Line 4<br/><br/></li>
    <li>Line 5</li>
</ul>