Sticky button div not working on IE11

by thunderbolt36

HTML

<!DOCTYPE html>
<html>

  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Edit - Movie App</title>
    <link href="/Content/bootstrap.css" rel="stylesheet" />
    <link href="/Content/site.css" rel="stylesheet" />

    <script src="/Scripts/modernizr-2.6.2.js"></script>
    <script src="/Scripts/modernizr-2.8.3.js"></script>


  </head>

  <body>
    <div class="navbar navbar-inverse navbar-fixed-top">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="navbar-brand" href="/Movies">MVC Movie</a>
        </div>
        <div class="navbar-collapse collapse">
          <ul class="nav navbar-nav">
            <li><a href="/">Home</a></li>
            <li><a href="/Movies">Movies</a></li>
            <li><a href="/Home/About">About</a></li>
            <li><a href="/Home/Contact">Contact</a></li>
          </ul>
          <ul class="nav navbar-nav navbar-right">
            <li><a href="/Account/Register" id="registerLink">Register</a></li>
            <li><a href="/Account/Login" id="loginLink">Log in</a></li>
          </ul>

        </div>
      </div>
    </div>
    <div class="container body-content">


      <h2>Edit</h2>
      <form action="/Movies/Edit/3" method="post">
        <input name="__RequestVerificationToken" type="hidden" value="kBoJXRfdKTYn4uw8fXl3V_yNVa_xD1s0vyepuNLJLxC3InZ-jA1R4b9EjFDO3SGMMp6T7E91m_wy9vGzm4Z0WUm1_8vljyrKMz6frJcQBqY1" />
        <div class="form-horizontal">
          <h4>Movie</h4>
          <hr />

          <input data-val="true" data-val-number="The field ID must be a number." data-val-required="The ID field is required." id="ID" name="ID" type="hidden" value="3" />

 ...

CSS

.sticky-button-thing-not-working-on-ie {
  position: sticky;
  bottom: 0;
  right: 0;
  background: rgba(0, 211, 211, 0.6);
}