pageLength not working as expected in angular datatable server side response

[srijanlama]

🪲 bug report

pageLength = 2 not returning expected result on datatable

  ngOnInit(): void {
    const that = this;
    this.dtOptions = {
      pagingType: 'full_numbers',
      pageLength: 2, // this should return datatable of page length 2 
      serverSide: true,
      processing: true,
      ajax: (dataTablesParameters: any, callback) => {
        that.http
          .post<DataTablesResponse>(
            environment.api_url + `job/manpower`,
            dataTablesParameters,
            {}
          )
          .subscribe((res: any) => {
            that.jobs = res.data;
            callback({
              recordsTotal: res.recordsTotal,
              data: [],
            });
          });
      },
      columns: [{ data: 'id' }, { data: 'title.en' }],
    };
  }

server api response

request payload

datatables shows more than 2 records

• NodeJS version: 14.15.1
• Angular version: 13.1.0
• Angular CLI version: 13.1.0
• jQuery version: ^3.6.0
• DataTables version: 1.11.3
• angular-datatables version: ^13.0.1

any help is Appreciated
Sri Zn