Hi there,

I've prepared a new template for Your issue. Please check out if it's working ok:

<template>
  <div class="flexible-content" :style="flexibleContentStyle">
    <!--Navbar-->
    <mdb-navbar position="top" style="margin-top: 60px" dark color="primary" href="#" scrolling>
      <mdb-navbar-toggler>
        <mdb-navbar-nav left>
          <mdb-icon icon="bars" size="2x" @click.native="toggle = !toggle" v-if="wide"/>
        </mdb-navbar-nav>
        <mdb-navbar-nav right>
          <mdb-nav-item to="/navigation/pro/double-navigation-v1" waves-fixed>Version 1</mdb-nav-item>
          <mdb-nav-item to="/navigation/pro/double-navigation-v2" waves-fixed>Version 2</mdb-nav-item>
          <mdb-nav-item to="/navigation/pro/double-navigation-v3" waves-fixed>Version 3</mdb-nav-item>
          <mdb-nav-item to="/navigation/pro/double-navigation-v4" waves-fixed>Version 4</mdb-nav-item>
          <mdb-nav-item to="/navigation/pro/double-navigation-v5" waves-fixed active>Version 5</mdb-nav-item>
        </mdb-navbar-nav>
      </mdb-navbar-toggler>
    </mdb-navbar>
    <!--/.Navbar-->
    <div class="light-blue-skin">
      <mdb-side-nav slim :isCollapsed="collapse" name="Anna Deynah" :OpenedFromOutside.sync="toggle" logo="https://mdbootstrap.com/img/Photos/Avatars/img%20(10).jpg" logoRound sideNavClass="sn-bg-1" mask="strong">
          <mdb-side-nav-nav>
            <mdb-side-nav-cat name="Submit blog" icon="chevron-right">
              <mdb-side-nav-item href="#" slimIcon="address-book">Submit listing</mdb-side-nav-item>
              <mdb-side-nav-item href="#" slimIcon="address-card">Registration form</mdb-side-nav-item>
            </mdb-side-nav-cat>
            <mdb-side-nav-cat name="Instruction" far icon="hand-pointer">
              <mdb-side-nav-item href="#" slimIcon="blog">For bloggers</mdb-side-nav-item>
              <mdb-side-nav-item href="#" slimIcon="pen">For authors</mdb-side-nav-item>
            </mdb-side-nav-cat>
            <mdb-side-nav-cat name="About" icon="eye">
              <mdb-side-nav-item href="#" slimIcon="handshake">Introduction</mdb-side-nav-item>
              <mdb-side-nav-item href="#" slimIcon="tasks">Monthly meetings</mdb-side-nav-item>
            </mdb-side-nav-cat>
            <mdb-side-nav-cat name="Contact me" far icon="envelope">
              <mdb-side-nav-item href="#">FAQ</mdb-side-nav-item>
              <mdb-side-nav-item href="#" slimIcon="paper-plane" >Write a message</mdb-side-nav-item>
            </mdb-side-nav-cat>
            <mdb-side-nav-item icon="angle-double-left" open-icon="angle-double-right" @toggle="toggleCollapse" toggler :isCollapsed="collapse" fixed>Minimize</mdb-side-nav-item>
          </mdb-side-nav-nav>
      </mdb-side-nav>
    </div>
    <div style="height: 100vh; margin-bottom: -25px">
      <div class="view intro-2">
        <div class="full-bg-img">
          <div class="mask rgba-black-strong flex-center">
            <div class="container">
              <div class="white-text text-center">
                <h2 class="font-weight-bold">Double navigation with fixed slim sidenav & fixed navbar</h2>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mdbNavbar, mdbNavItem, mdbNavbarNav, mdbNavbarToggler, mdbDropdown, mdbDropdownItem, mdbDropdownMenu, mdbDropdownToggle, mdbInput, mdbBtn, mdbSideNav, mdbSideNavNav, mdbSideNavCat, mdbSideNavItem, mdbIcon, waves } from 'mdbvue';

export default {
  name: 'DoubleNavigationPagev1',
  components: {
    mdbNavbar,
    mdbNavItem,
    mdbNavbarNav,
    mdbNavbarToggler,
    mdbDropdown,
    mdbDropdownItem,
    mdbDropdownMenu,
    mdbDropdownToggle,
    mdbInput,
    mdbBtn,
    mdbSideNav,
    mdbSideNavNav,
    mdbSideNavCat,
    mdbSideNavItem,
    mdbIcon
  },
  data() {
    return {
      toggle: false,
      wide: true,
      collapse: false,
      flexibleContentStyle: false
    };
  },
  mounted(){
    this.handleResize();
    document.getElementById("main-navbar").style.height = '60px';
    window.addEventListener('resize', this.handleResize);
  },
  beforeDestroy(){
    document.getElementById("main-navbar").style.height = null;
    window.removeEventListener('resize', this.handleResize);
  },
  methods: {
    handleResize() {
      if (window.outerWidth < 1440) {
        this.wide = true;
        this.flexibleContentStyle = {
          marginLeft: 0
        };
      } else {
        this.wide = false;
        if (this.collapse) {
          this.flexibleContentStyle = {
            marginLeft: '60px'
          };
        } else {
          this.flexibleContentStyle = {
            marginLeft: '240px'
          };
        }
      }
    },
    toggleCollapse() {
      this.collapse = !this.collapse;
      this.handleResize();
    }
  },
  mixins: [waves]
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.view {
  background: url("https://mdbootstrap.com/img/Photos/Others/img (44).jpg")no-repeat center center;
  background-size: cover;
  height: 100%;
}
.navbar i {
  cursor: pointer;
  color: white;
}
.flexible-content, .flexible-content .navbar {
  transition: margin-left 0.5s;
}
</style>

Best regards

Hello there,

Is this issue already solved? If not, is there any plans to be released anytime soon?

Thank you in advance,

Hi there,

Please add the following class to disable overlay:

#sidenav-overlay {
    display: none;
}

Also will try to fix other issues with double navigation as soon as possible.

Best regards