Expected behavior The highlighted value should not hide

Actual behavior Highlighted value is getting hidden at a particular point while pressing the down key continuously

Note Dropdown values should have more items.

Resources (screenshots, code snippets etc.)

  <div class="md-form">
  <input
    type="text"
    class="completer-input form-control mdb-autocomplete"
    [ngModel]="searchText | async"
    (ngModelChange)="searchText.next($event)"
    [mdbAutoCompleter]="auto"
    placeholder="Choose your color"
  />
  <mdb-auto-completer #auto="mdbAutoCompleter" textNoResults="I have found no results :(">
    <mdb-option *ngFor="let option of results | async" [value]="option">
      {{ option }}
    </mdb-option>
  </mdb-auto-completer>
</div>