title: Font Size Of Page Header Changing After Refreshing Page - Yii2
body: <p>I'm having Register/Login Page. After submitting page, it successfully go to another page. As soon i click 'back' button on browser, it comes to Register/Login page. But, font size of "Page Header" is not same as it was before submitting. </p>
  
  <p>After pressing <kbd>Ctrl</kbd>+<kbd>F5</kbd> more than 2-3 times, 'Page-Header' appears correct. </p>
  
  <p>I'm showing 2 screen shot. First One is before submitting. Second One is, Clicking 'Back' Button in browser.</p>
  
  <ul>
  <li>Before Submitting</li>
  </ul>
  
  <p><a href="https://i.stack.imgur.com/ynYP2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ynYP2.png" alt="enter image description here"></a></p>
  
  <ul>
  <li>After Clicking 'Back' Button</li>
  </ul>
  
  <p><a href="https://i.stack.imgur.com/R2plS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/R2plS.png" alt="enter image description here"></a></p>
  
  <p>You all can clearly see.. Page Header -> 'Register' &amp; 'Login' is changed.</p>
  
  <p>[NOTE: It not happens every time. But, i've seen this problem several times.]</p>
  
  <p><a href="https://i.stack.imgur.com/XULWS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XULWS.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/8kqV5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8kqV5.png" alt="enter image description here"></a></p>
  
  <p>Here, is my code.</p>
  
  <pre><code>&lt;?php
  use yii\helpers\Html;
  use yii\bootstrap\ActiveForm;
  use yii\captcha\Captcha;
  
  $this-&gt;title = 'Register';
  $this-&gt;params['breadcrumbs'][] = $this-&gt;title;
  ?&gt;
  &lt;div class="site-about"&gt;
      &lt;div class="row"&gt;
                  &lt;div class="col-lg-6"&gt;
              &lt;h1&gt;Register&lt;/h1&gt;
              .
              .
          &lt;/div&gt;
          &lt;div class='col-lg-6'&gt;
              &lt;h1&gt;Login&lt;/h1&gt;
              .
              .
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>