Retornando data vazia no form(Angular)

Boa Tarde

Eu criei um form modal que tem um campo de data(datepicker), que exibe o calendário com a data. Porém na hora de salvar, ele vem como null.
HTML:

Novo agendamento

×

{{formName}}

Data*
            <label class="col-md-2 col-sm-3 col-xs-12 control-label">{{lbHorarioDe}}</label>
            <div class="col-md-2 col-sm-4 col-xs-12">
              <div class="input-group clockpicker" clock-picker data-autoclose="true">
                <input type="text" class="form-control" id="horarioDe" name="HorarioDe"
                  formControlName="txtHorarioDe" required>
                <span class="input-group-addon">
                  <i class="fa fa-clock-o"></i>
                </span>
              </div>
            </div>
            <label class="col-md-1 col-sm-3 col-xs-12 control-label  ">Até*</label>
            <div class="col-md-2 col-sm-4 col-xs-12">
              <div class="input-group clockpicker" clock-picker data-autoclose="true">
                <!-- <label>Até</label> -->
                <input type="text" class="form-control" id="horarioAte" name="horarioAte"
                  formControlName="txtHorarioAte" required>
                <span class="input-group-addon">
                  <i class="fa fa-clock-o"></i>
                </span>
              </div>
            </div>
          </div>
        </div>
        <div class="row">
          <div class="form-group">
            <label class="col-md-2 col-sm-3 col-xs-12 control-label">Profissional*</label>
            <div class="col-md-10 col-sm-9 col-xs-12">
              <select class="chosen form-control" name="profissional" formControlName="cmbProfissional"
                data-placeholder="Selecione um profissional...">
                <option selected>Selecione o profissional</option>
                <option *ngFor="let prof of listProfissional" [ngValue]="prof.id">
                  {{prof.nome}}
                </option>
              </select>
            </div>
          </div>
        </div>
        <div class="row">
          <div class="form-group">
            <label class="col-md-2 col-sm-3 col-xs-12 control-label">Cliente*</label>
            <div class="col-md-5 col-sm-9 col-xs-12">
              <div class="ng-autocomplete">
                <ng-autocomplete [data]="listClientes" placeholder="Nome do cliente" [searchKeyword]="keyword"
                  (selected)='selectEvent($event)' (inputChanged)='onChangeSearch($event)'
                  (inputFocused)='onFocused($event)' [itemTemplate]="itemTemplate"
                  [notFoundTemplate]="notFoundTemplate">
                  [formControlName]="txtCliente"


                </ng-autocomplete>

                <ng-template #itemTemplate let-item>
                  <a class="" [innerHTML]="item.nome"></a>
                </ng-template>

                <ng-template #notFoundTemplate let-notFound>
                  <div class="" [innerHTML]="notFound"></div>
                </ng-template>
              </div>
            </div>
          </div>
        </div>
        <div class="row">
          <div class="form-group">
            <label class="col-md-2 col-sm-3 col-xs-12 control-label">Status*</label>
            <div class="col-md-4 col-sm-9 col-xs-12">
              <select class="chosen form-control" name="statusAgendamento" formControlName="cmbStatus"
                data-placeholder="Selecione um status...">
                <option *ngFor="let status of listStatus" [ngValue]="status.id">
                  {{status.descricao}}
                </option>
              </select>
            </div>
          </div>
        </div>
        <div class="row">
          <div class="form-group">
            <label class="col-md-2 col-sm-3 col-xs-12 control-label">Observação</label>
            <div class="col-md-10 col-sm-9 col-xs-12">
              <textarea class="form-control" rows="5" id="observacao" name="observacao"
                formControlName="txtObservacao"></textarea>
            </div>
          </div>
        </div>

      </fieldset>

    </div>
    <div class="modal-footer">
      <button type="button" class="btn btn-primary" type="submit" value="Salvar">Salvar</button>
      <button type="button" class="btn btn-danger" data-dismiss="modal">Fechar</button>
    </div>
  </form>
</div>

TS

@Component({
  selector: 'app-agenda-novo-editar',
  templateUrl: './agenda-novo-editar.component.html',
  styleUrls: ['./agenda-novo-editar.component.css']
})
export class AgendaNovoEditarComponent implements OnInit {

  page: number = 0;
  count: number = GESTAOFISIO_QTDREGISTROS;
  listProfissional = [];
  listClientes = [];
  listStatus = [];
  keyword = 'nome';
  formName = 'Novo Agendamento';
  agenda = new Agenda();
  formAgenda: FormGroup;
  lbHorarioDe = "Horário de*"

  constructor(
    private router: Router,
    private route: ActivatedRoute,
    private formBuilder: FormBuilder,
    private usuarioService: UsuarioService,
    private clienteService: ClienteService,
    private agendaService: AgendaService,
    private messageUtils: MessageUtilsService,
    private spinner: NgxSpinnerService,
    private storage: LocalStorageService) { }

  ngOnInit() {
    this.spinner.show("loadingForm");
    
    this.findProfissionais();
    this.findStatus();
    
    this.inicializaAgenda()   
    this.createForm(this.agenda);
    this.spinner.hide("loadingForm");

    
  }
  inicializaAgenda() {

    this.agenda.usuario = new Usuario();
    this.agenda.cliente = new Cliente();
    this.agenda.status = new AgendamentoStatus();    
    this.agenda.status.id = 1; // Agendado 
    //this.agenda.dataAgendamento = new Date()
    this.getProfissionalLogado();

  }
  getProfissionalLogado() {
    this.agenda.usuario = this.storage.getUsuarioLogadoFromLocalStorage();
  }

  createForm(agenda: Agenda) {
    this.formAgenda = this.formBuilder.group({
      dataAgendamento: [agenda.dataAgendamento],
      txtHorarioDe: [agenda.horarioInicio,[Validators.required]],
      txtHorarioAte: [agenda.horarioFim,[Validators.required]],
      cmbProfissional: [agenda.usuario.id],
      txtCliente: [agenda.cliente.id],
      cmbStatus: [agenda.status.id],
      txtObservacao: [agenda.observacao]

    })
  }

  salvar(){
    console.log(this.formAgenda.get("dataAgendamento").value)
    //console.log(this.formAgenda.valid)
    console.log("Salvando.....")
  }

  findProfissionais() {
    this.usuarioService.findAllProfissional(this.page,this.count).subscribe((responseApi: ResponseApi) => {
      this.listProfissional = responseApi['data']['content'];
    });
  }

  findClienteByName(nome:String) {
    this.clienteService.findByName(nome,this.page,this.count).subscribe((responseApi: ResponseApi) => {
      this.listClientes = responseApi['data']['content'];
    });
  }

  findStatus() {
    this.agendaService.findAllStatus().subscribe((responseApi: ResponseApi) => {
      this.listStatus = responseApi['data']['content'];
    });
  }

  selectEvent(item) {
    // do something with selected item
  }

  onChangeSearch(nome: string) {
    console.log(nome)
    this.findClienteByName(nome);
  }
  
  onFocused(e){
    // do something when input is focused
  }

}