AgGrid过滤器在应用过滤器时被清除

Question

我已经进行了serverSide分页和过滤，但是随着分页的进行，过滤无法正常工作。触发过滤器操作后，将过滤响应，但是过滤器值本身消失了-这是网格的正常行为吗？我看到文档示例保存了过滤器输入值，我的问题已清除。

  items: Item[] = [];
  gridOptions: GridOptions = {
    pagination: true,
    rowModelType: 'serverSide',
    cacheBlockSize: this.itemsPerPage,
    paginationPageSize: this.itemsPerPage
  };
  columnDefs: ColDef[] = [
    {
      field: 'name',
      filter: 'agTextColumnFilter',
      filterParams: {

      },
      sortable: true
    },
    {
      field: 'value',
      filter: 'agTextColumnFilter',
      sortable: true
    },
    {
      field: 'Actions',
      cellRendererFramework: ItemActionRendererComponent,
      cellRendererParams: {
        label: 'actions'
      }
    },
    { field: 'hiddenColumn', filter: 'agTextColumnFilter', sortable: true, hide: true }
  ];

   // ...
 onGridReady = params => {
    this.gridApi = params.api;
    this.columnApi = params.columnApi;

    this.gridApi.refreshHeader();

    this.gridApi.setServerSideDatasource(this.gridServerDataSource());
  };

  gridServerDataSource(): IServerSideDatasource {
    return {
      getRows: (params: IServerSideGetRowsParams) => {
        const request: IServerSideGetRowsRequest = params.request;
        this.itemService
          .query({
            page: request.endRow / this.itemsPerPage - 1,
            size: this.itemsPerPage,
            sort: this.sort(request.sortModel),
            filter: this.filter(request.filterModel)
          })
          .subscribe(
            (res: HttpResponse<IOrder[]>) => this.paginateItems(res.body, res.headers, params),
            (res: HttpErrorResponse) => this.onError(res.message)
          );
      }
    };
  }

  protected paginateItems(data: IOrder[], headers: HttpHeaders, params: IServerSideGetRowsParams) {
    this.links = this.parseLinks.parse(headers.get('link'));
    this.totalItems = parseInt(headers.get('X-Total-Count'), 10);
    params.successCallback(data, this.totalItems);
  }

<ag-grid-angular
    [gridOptions]="gridOptions"
    [rowData]="items"
    [columnDefs]="columnDefs"
    [floatingFilter]="true"
    [sideBar]="sideBar"
    (gridReady)="onGridReady($event)"
    [frameworkComponents]="frameworkComponents">
</ag-grid-angular>

我的设置有问题吗？