Content disappear with existing list

[sammiwei911]

Version: "^0.2.5"
We have recently adopted this lib for our editor. Here is the sample code that we have previously generated using default list

<ul><li><span><strong>A: </strong></span><span>content A</span></li><li><span><strong>B: </strong></span><span>content B</span></li><li><span><strong>C: </strong></span><span>Content C</span></li><li><span><strong>D: </strong></span><span>Content D</span></li></ul>

After the rendering with this plugin, some of the content were lost, the html becomes

<ul class="unordered-list" data-key="25"><li class="list-item" data-key="26"><div class="list-item-child" data-key="69"><span data-key="27"><span data-slate-leaf="true" data-offset-key="27:0"><span><strong><span data-slate-content="true">A: </span></strong></span></span></span></div></li><li class="list-item" data-key="29"><div class="list-item-child" data-key="68"><span data-key="30"><span data-slate-leaf="true" data-offset-key="30:0"><span><strong><span data-slate-content="true">B: </span></strong></span></span></span></div></li><li class="list-item" data-key="32"><div class="list-item-child" data-key="67"><span data-key="33"><span data-slate-leaf="true" data-offset-key="33:0"><span><strong><span data-slate-content="true">C: </span></strong></span></span></span></div></li><li class="list-item" data-key="35"><div class="list-item-child" data-key="66"><span data-key="36"><span data-slate-leaf="true" data-offset-key="36:0"><span><strong><span data-slate-content="true">D: </span></strong></span></span></span></div></li></ul>

All the Contents span are gone as show in screenshot:

If we add a div to each li element, it seems to be working. Below is an example:

<ul><li><div><span><strong>A: </strong></span><span>Content A</span></div></li><li><div><span><strong>B: </strong></span><span>Content B</span></div></li><li><div><span><strong>C: </strong></span><span>Content C</span></div></li><li><div><span><strong>D: </strong></span><span>Content D</span></div></li></ul>