Hi!

SideNav button disappears in full screen mode, and appears only in window mode.

How to fix this problem, and make SideNav button continuously visible, independent from screen mode?

<!--Double Navigation -->
<header>

    <!-- Sidebar navigation -->
    <div id="slide-out" class="side-nav sn-bg-1">  <!--"fixed" sn-bg-1  removed! wide red darken-4-->   
      <ul class="custom-scrollbar">

      </ul>

  <!--div class="sidenav-bg red darken-4"></div-->
</div> <!--/. Sidebar navigation     -->

<!--Navbar -->
  <nav class="navbar fixed-top navbar-toggleable-md navbar-expand-lg navbar-dark red darken-4 scrolling-navbar double-nav"> <!--  primary-color -->

    <!-- SideNav slide-out button float-left -->
    <div class="float-left">
      <a href="#" data-activates="slide-out" class="button red darken-4 p-3 button-collapse black-text">
        <i class="fas fa-bars"></i>
      </a>
    </div>
</nav> <!--/.Navbar-->

Expected behavior (just in window mode)

Actual behavior (in full screen mode)

Resources (screenshots, code snippets etc.)