title: tinymce 5 fire error if insert newline after html element
body: <p>i try to use the html select element (<code>&lt;select size=&quot;1&quot;&gt;&lt;option&gt;One&lt;/option&gt;&lt;/select&gt;</code>) in my tinymce editor.</p>
  <p>It works but if i try to insert a newline after the select element with the enter key, i get an error in the console:</p>
  <pre><code>Uncaught TypeError: Cannot read property 'normalize' of null
  </code></pre>
  <p><a href="https://jsfiddle.net/1zjka8px/8/" rel="nofollow noreferrer">Here is an example with jsfiddle</a></p>
  <p>Why tinymce fire this error and how can i solve this?</p>