Select with Search not working in Modal Dialogs

Expected behavior Select field with search to work when used in a fullscreen modal dialog

Actual behavior Select field could be initialized within fullscreen modal dialog, but the search field is not focusable, neither per mouse or keyboard. The search input field is displayed but not usable.

 <!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-mdb-toggle="modal" data-mdb-target="#exampleModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal top fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true" data-mdb-backdrop="true" data-mdb-keyboard="true">
  <div class="modal-dialog modal-fullscreen ">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="btn-close" data-mdb-dismiss="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">...
<select class="select" data-mdb-filter="true">
  <option value="1">One</option>
  <option value="2">Two</option>
  <option value="3">Three</option>
  <option value="4">Four</option>
  <option value="5">Five</option>
  <option value="6">Six</option>
  <option value="7">Seven</option>
  <option value="8">Eight</option>
  <option value="9">Nine</option>
  <option value="10">Ten</option>
</select>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-mdb-dismiss="modal">
          Close
        </button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>