closing tags of li and ul eaten by data-simple-tooltip attribute

[Un1Gfn]

wikitext input

* {{#simple-tooltip: ListItem | TooltipText }}
= Subtitle =

expected output (some parts are omitted)

<div class="mw-parser-output">
  <ul>
    <li>
      <span class="simple-tooltip simple-tooltip-inline" data-simple-tooltip="TooltipText">ListItem</span>
    </li>
  </ul>
  <h1>
    <span class="mw-headline" id="Subtitle">Subtitle</span>
  </h1>
</div>

actual output

<div class="mw-parser-output">
  <ul>
    <li>
      <span class="simple-tooltip simple-tooltip-inline" data-simple-tooltip="<p>TooltipText</li></ul><p></p>">ListItem</span>
      <p class="mw-empty-elt"></p>
      <h1>
        <span class="mw-headline" id="Subtitle">Subtitle</span>
      </h1>
    </li>
  </ul>
</div>

[Un1Gfn]

As shown in the screenshot, the "Subtitle" is indented.
It should NOT be indented.

As shown in the screenshot, the "Subtitle" is indented.
It should NOT be indented.