Dropdown positioning: problems after resizing the screen

Expected behavior

After flipping a phone between portrait and landscape, we dynamically change the position of the dropdown by adding/removing positioning classes like dropstart or drop-down-menu-end. The position of the dropdown should reflect these dynamically-changed positioning classes.

Actual behavior

The classes position the dropdown correctly in a static page. But if the layout changes (by rotating a device or resizing a window), updating the positioning classes has no effect. The user would have to refresh their screen.

Resources (screenshots, code snippets etc.)

Uploading image files to this forum is not working at the moment, so here are links to the screenshots:

step 1 - all OKhttps://app.screencast.com/VS6yKTf3ZO0BU

step 2 - rotated the phone and dynamically change the dropdown positioning classes. We've got problems!https://app.screencast.com/Eix4rzUwQy6vg

step 3 - same classes as step 2 but now we have refreshed the screen. No problems.https://app.screencast.com/gHRXoovu6Fo17

<mdb-sidenav #sidenav="mdbSidenav"

[backdrop]="false" [backdropClass]="'custom-backdrop'" [width]="360" [slimWidth]="136" [right]="true" [focusTrap]="false" (sidenavHidden)="toggled('hidden', $event)" (sidenavExpanded)="toggled('expanded', $event)" (sidenavCollapsed)="toggled('collapsed', $event)" > {{getUserNameWithTruncation()}}

          <img class="user-profile-img"
            [src]="user?.picture ? user.picture : 'https://res.cloudinary.com/cebt/image/upload/v1616972586/users/avatars/default-avatar.gif' "
            alt="Profile image">
            <span class="click-indicator animation-pulse-infinite"></span>


        </div>
      </a>
        <multisite-user-account-dropdown mdbDropdownMenu class="dropdown-menu"
          [user]="user"
          (logout)="doLogout()"
          ></multisite-user-account-dropdown>
    </div>
  </div>
</li>
<!-- 
  SIDENAV BOTTOM PART
  (One scrollable element - split into two parts) 
-->
<li class="sidenav-main-content" (click)="toggle()">
  <!-- TOP PART OF MAIN CONTENT -->
  <div>
    <div class="card-group">

    <!-- content here -->  

  </div>
  <!-- BOTTOM PART OF MAIN CONTENT -->
  <div>
    <hr *ngIf="isAdmin()">

    <progress-indicator-slimmable-number
    (click) = "toggleSlimOpenNotClose($event)"
    [slimMode]="sidenav.slimCollapsed"
    ></progress-indicator-slimmable-number>

    <div class="trainer-card" *ngIf="isAdmin()" (click) = "toggleSlimOpenNotClose($event)">

      <carousel [interval]="false">
        <p class="trainer-title">Trainers</p>
        <slide>
          <div class="trainer-img">
            <img src="https://iili.io/yzAHJf.png" alt="">
            <div class="status-indicator"></div>
          </div>
          <div class="card-text">
            <p class="title">Jean Doe</p>
            <p class="subtitle">
              Head of ...
            </p>
          </div>
        </slide>
        <slide>
          <div class="trainer-img">
            <img src="https://iili.io/yzAHJf.png" alt="">
            <div class="status-indicator"></div>
          </div>
          <div class="card-text">
            <p class="title">James Dean</p>
            <p class="subtitle">
              UX/UI Designer
            </p>
          </div>
        </slide>
        <slide>
          <div class="trainer-img">
            <img src="https://iili.io/yzAHJf.png" alt="">
            <div class="status-indicator"></div>
          </div>
          <div class="card-text">
            <p class="title">John Doe</p>
            <p class="subtitle">
              Senior Trainer
            </p>
          </div>
        </slide>
      </carousel>

      <!-- <div class="card-body bg-white">
          <div class="trainer-img">
            <img src="https://iili.io/yzAHJf.png" alt="">
            <div class="status-indicator"></div>
          </div>
          <div class="card-text">
            text
          </div>
        </div> -->
    </div>
  </div>
</li>