title: When a list boxes hover , the right side content box changes but sometimes they show in 2 content boxes
body: <p>If I hover biochemistry box ,that biochemistry content visible in right side corner. if I hover over cytopathology the biochemistry content will smoothly disappear and the cytopathology content will appear... and so on. but Sometimes the biochemistry and cytopathology content visible in same time.</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
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  <pre class="snippet-code-js lang-js prettyprint-override"><code>$(".nav-link").hover(function() {
    $(this).tab("show")
  })</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/js/bootstrap.bundle.min.js"&gt;&lt;/script&gt;
  &lt;link href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/css/bootstrap.min.css" rel="stylesheet" /&gt;
  
  
  &lt;ul class="nav nav-tabs" id="myTab" role="tablist"&gt;
    &lt;li class="nav-item"&gt;
      &lt;a href="#first" class="nav-link" id="first-tab" data-toggle="tab" role="tab" aria- controls="first" aria-selected="false"&gt;
        &lt;h3&gt;Biochemistry&lt;/h3&gt;
      &lt;/a&gt;
    &lt;/li&gt;
    &lt;li class="nav-item"&gt;
      &lt;a href="#second" class="nav-link" id="second-tab" data-toggle="tab" role="tab" aria- controls="second" aria-selected="false"&gt;
        &lt;h3&gt;Cytopathology&lt;/h3&gt;
      &lt;/a&gt;
    &lt;/li&gt;
  &lt;/ul&gt;
  
  &lt;div class="tab-content" id="myTabContent"&gt;
    &lt;div class="tab-pane fade show active" id="first" role="tabpanel" aria-labelledby="first-tab"&gt;
      &lt;h2&gt;Biochemistry&lt;/h2&gt;
      &lt;p&gt;Lorem ipsum dolor, sit amet consectetur adipisicing elit. Ab aliquid veritatis commodi quia architecto vero ullam sequi sunt temporibus at cumque adipisci dolor laudantium dolorum, liberoharum similique aliquam vitae!&lt;/p&gt;
    &lt;/div&gt;
    &lt;div class="tab-pane fade" id="second" role="tabpanel" aria-labelledby="second-tab"&gt;
      &lt;h2&gt;Cytopathology&lt;/h2&gt;
      &lt;p&gt;Lorem ipsum dolor, sit amet consectetur adipisicing elit. Ab aliquid veritatis commodi quia architecto vero ullam sequi sunt temporibus at cumque adipisci dolor laudantium dolorum, liberoharum similique aliquam vitae!&lt;/p&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
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