title: H1 flickering instead of hiding
body: <p>So I was trying to build a hexagonal layout, I followed a code pen tutorial and it works great. However when I put a H1 in the div, I want it to disappear on hover, it does this but only every now and again. Most of the time it flickers.</p>
  
  <p>JS fiddle link below</p>
  
  <p><a href="http://jsfiddle.net/bcsz6whz/" rel="nofollow">http://jsfiddle.net/bcsz6whz/</a></p>
  
  <p>HTML and CSS Code</p>
  
  <pre><code>&lt;section id="lab"&gt;
  
      &lt;article&gt;
  
          &lt;div class="lab_item"&gt;    
          &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/200/320);"&gt;
  
                    &lt;h1 class="hoverheading"&gt;Test&lt;br /&gt;Test&lt;/h1&gt;
  
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
            &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/200/320);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
   &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/200/310);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
   &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/200/300);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
                &lt;div class="lab_item"&gt;        
          &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/300/300);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
            &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/300/400);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
            &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/500/500);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
            &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/600/600);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
            &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/700/700);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
            &lt;div class="lab_item"&gt;
            &lt;div class="hexagon hexagon2"&gt;
              &lt;div class="hexagon-in1"&gt;
                  &lt;div class="hexagon-in2" style="background-image: url(http://placekitten.com/250/300);"&gt;                
                  &lt;/div&gt;
               &lt;/div&gt;
           &lt;/div&gt;
           &lt;/div&gt;
  
  
  
  
    &lt;/article&gt;
  &lt;/section&gt;
  
  &lt;style type="text/css"&gt;
  
  /* HTML5 display-role reset for older browsers */
  article, aside, details, figcaption, figure, 
  footer, header, hgroup, menu, nav, section {
    /*display: block;*/
  }
  body {
    line-height: 1;
  }
  ol, ul {
    list-style: none;
  }
  blockquote, q {
    quotes: none;
  }
  blockquote:before, blockquote:after,
  q:before, q:after {
    content: '';
    content: none;
  }
  table {
    border-collapse: collapse;
    border-spacing: 0;
  }
  
  #lab {
    /*width: 1000px;*/
    overflow: hidden;
    padding-bottom: 70px;
    position: relative;
    margin: 0 auto;
    margin-bottom: 2.5em;
  
    /*-webkit-transition: all ease 500ms;
    -moz-transition: all ease 500ms;
    -o-transition: all ease 500ms;
    -ms-transition: all ease 500ms;
    transition: all ease 500ms;*/
  }
  
  h1 {
    /*font-family: bebas_neueregular ,sans-serif;
    font-size: 1.75em;
    padding: 0.2em 0 0.2em 0.2em;
    color: #000000;
    text-shadow: 0 0.06em 0 #424242;*/
    position: relative;
  
  }
  
  #lab h1 {
  }
  
  #lab h1:hover {
  visibility: hidden;
  }
  
  #lab .hoverheading {
    top: 140px;
      /* left: 11px; */
      text-align: center;
      vertical-align: center;
  
  }
  
  #lab .hoverheading:hover{
    visibility: hidden;
  }
  
  /*.beaker {
    -webkit-filter: drop-shadow(#424242 0px 1px 0px);
    border-bottom: 2em solid #FFF;
    border-left: 1em solid transparent;
    border-right: 1em solid transparent;
    border-radius: .5em;
    height: 0;
    width: 1em;
    position: absolute;
    right: 0.7em;
    bottom: 22%;
    font-size: 0.6em;
  }
  
  .beaker::before {
    border-left: .25em solid #FFF;
    border-radius: .25em;
    border-right: .25em solid #FFF;
    content: '';
    height: .25em;
    left: -.25em;
    position: absolute;
    top: -1em;
    width: 1em;
  }
  
  .beaker::after {
    border-left: .25em solid #FFF;
    border-right: .25em solid #FFF;
    content: '';
    height: 1em;
    left: 0;
    position: absolute;
    top: -1em;
    width: .5em;
  }*/
  
  .sectionheader {
    position: relative;
  }
  
  .lab_item {
    width: 200px;
    height: 230px;
    position: relative;
    display: inline-block;
  }
  
  .hexagon2 {
    position: absolute;
    width: 200px;
    height: 400px;
    top: -85px;
  }
  
  .hexagon {
    overflow: hidden;
    visibility: hidden;
  
    -webkit-transform: rotate(120deg);
    -moz-transform: rotate(120deg);
    -o-transform: rotate(120deg);
    -ms-transform: rotate(120deg);
    transform: rotate(120deg);
    cursor: pointer;
  }
  
  .hexagon-in1 {
    overflow: hidden;
    width: 100%;
    height: 100%;
  
    -webkit-transform: rotate(-60deg);
    -moz-transform: rotate(-60deg);
    -o-transform: rotate(-60deg);
    -ms-transform: rotate(-60deg);
    transform: rotate(-60deg);
  }
  
  .hexagon-in2 {
    -webkit-box-shadow: inset 0 0 0 200px rgba(253, 242, 0, 1.00);
    box-shadow: inset 0 0 0 200px rgba(253, 242, 0, 1.00);
    overflow: hidden;
    width: 100%;
    height: 100%;
    background-repeat: no-repeat;
    background-position: 50%;
  
    -webkit-background-size: 125%;
    -moz-background-size: 125%;
    background-size: 125%;
    visibility: visible;
  
    -webkit-transform: rotate(-60deg);
    -moz-transform: rotate(-60deg);
    -o-transform: rotate(-60deg);
    -ms-transform: rotate(-60deg);
    transform: rotate(-60deg);
  
    -webkit-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    -ms-transition: all 0.5s ease;
    transition: all 0.5s ease;
  }
  
  .hexagon-in2:hover {
    -webkit-box-shadow: inset 0 0 0 0px #B0DAD4;
    box-shadow: inset 0 0 0 0px #B0DAD4;
  }
  
  #lab article {
    padding-top: 1em;
    width: 820px;
    margin: 0 auto;
  }
  
  .lab_item:nth-child(7n-2) {
    margin-left: 101px;
  }
  
  .lab_item:nth-child(n+5) {
    margin-top: -55px;
  }
  
  @media (max-width: 1015px) {
    #lab {
    width: 100%;
  }
  
  }
  
  @media (max-width: 820px) {
    .lab_item:nth-child(5n-1) {
    margin-left: 102px;
  }
  
  .lab_item:nth-child(n+4) {
    margin-top: -62px;
  }
  
  .lab_item:nth-child(7n-2) {
    margin-left: 0px;
  }
  
  .lab_item:nth-child(n+5) {
    margin-top: -56px;
  }
  
  #lab article {
    width: 610px;
  }
  
  }
  
  @media (max-width: 640px) {
    #lab article {
    width: 405px;
  }
  
  .lab_item:nth-child(5n-1) {
    margin-left: 0px;
  }
  
  .lab_item:nth-child(3n) {
    margin-left: 102px;
  }
  
  .lab_item:nth-child(n+3) {
    margin-top: -56px;
  }
  
  }
  
  @media (max-width: 450px) {
    #lab article {
    width: 300px;
  }
  
  .lab_item:nth-child(3n) {
    margin-left: 0px;
  }
  
  .lab_item:nth-child(2n) {
    margin-left: 102px;
  }
  
  .lab_item:nth-child(n+2) {
    margin-top: -56px;
  }
  
  }
  
  &lt;/style&gt;
  </code></pre>
  
  <p>I can't figure out it flickers and doesn't hide correctly</p>
  
  <p>Could you point me in the right direction</p>
  
  <p>Thanks</p>