数据更新后，Dxo过滤器会发生变化

Question

我有这种情况：

有一些按钮，一个无用的标题和网格。第一次渲染组件时，一切都很好。当我按下另一个按钮时，我进行API调用以更新数据，并且过滤器随机显示(Tutto)。 （Tutto是意大利语单词，意思是“一切”）。事实是，我还没有写任何有关更改任何类型的过滤的内容。

这是表格html代码：

<dx-data-grid
                          id="grid"
                          [dataSource]="dataSource"
                          [showColumnLines]="true"
                          [showRowLines]="true"
                          [showBorders]="true"
                          [remoteOperations]="true"
                          [rowAlternationEnabled]="true"
                          [allowColumnResizing] = "true"
                          [columnResizingMode] = "'widget'"
                          [columnAutoWidth] = "false"
                          (onCellClick)='cellClick($event)'
                          [columns]="gridColumns"
                          (onToolbarPreparing)="onToolbarPreparing($event)"
                          (onExporting)="onExporting($event)"
                          (onExported)="onExported($event)"
                          >

                          <!-- <dxo-header-filter [allowSearch]="true" [visible]="true"></dxo-header-filter> -->

                          <div *dxTemplate="let data of 'zoomInMap'">
                              <span class="p3-001-map-crosshair-a zoomLink-PUC" *ngIf="data.value"></span>
                          </div>

                          <div *dxTemplate="let data of 'openFile'">
                            <div *ngIf="data.value!='' && data.value!=null">
                              <a style='cursor:pointer;text-decoration:underline;color:rgba(5, 60, 222, 0.98)'>Apri</a>
                            </div>
                          </div>

                          <dxo-column-chooser
                          [allowSearch]="true"
                          [enabled]="true"
                          [mode]="'select'"
                          height="390">
                          </dxo-column-chooser>

                          <dxo-remote-operations
                          sorting="true"
                          paging="true"
                          filtering="true">
                          </dxo-remote-operations>

                          <dxo-scrolling mode="virtual" rowRenderingMode="virtual" ></dxo-scrolling>

                          <dxo-filter-row
                          visible="true"
                          applyFilter="auto">
                          </dxo-filter-row>

                          <dxo-search-panel
                          visible="minimized"
                          width="240"
                          placeholder="{{lang.phrase('search...')}}">
                          </dxo-search-panel>

                          <dxo-load-panel enabled="true"></dxo-load-panel>

                          <dxo-export [enabled]="true" fileName="Export" [allowExportSelectedData]="false"></dxo-export>

                        </dx-data-grid>

这是更新网格内数据的代码：

 this.dataSource.store = new CustomStore({
        load: function (loadOptions) {
          if(loadOptions['dataField']=="file_desc") {
            var params="?classname=" + me.aClassID + "&key=_undefined&filter=&sort=&skip=0&take=15";
            // add authorization header with jwt token
            let headers = new Headers({ 'Authorization': 'Bearer ' + authenticationService.token });
            let options = new RequestOptions({ headers: headers });
            return http.get(valueListUrl + params, options)
            .toPromise()
            .then(response => {
              var json = response.json();
              return {
                data: json.data,
                totalCount: json.totalCount
              };
            }).catch(() => { throw 'Errore caricamento dati' });

        }
      });

当我按下按钮时，上面的代码将以这种方式调用：

this.dataGrid.instance.refresh()
      .then( () => {
          this.dataGrid.instance.clearFilter();
      });

有人发现吗？任何帮助表示赞赏。