JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.6/semantic.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.6/semantic.js"></script>
 <p style="color:red">
 NOTE. This issue was corrected by adding "fixed" class to the table. 
 </p>
 
 <p>
Card in a segment 
 </p>
 <div class="ui segment">
 <div class="ui fluid card">
          <div class="content">
            <div class="description">Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen
              book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more
              recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
          </div>
        </div>
 </div>
  <p>
  Segment only
 </p>
 <div class="ui segment"> Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
          It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with
          desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum. </div>
 <div class="ui fixed segment"><table width="100%" cellspacing="0" class="ui table" >
  <thead>
    <tr>
      <th>&nbsp;</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>
        <p>
          This card extends out of the table
    ...

CSS

body {
  margin: 30px;
}

p {
  font-weight:bold;
}