Link to test case:
I use internal data to fill the table so I am not allowed to share a case.

Error messages shown:
tests_table.draw() is not a function

Description of problem:
Hi, I use child tables to show detailed informations of the respective parent row. I use two checkboxes to filter the parent table rows and it is working perfect. I do that by applying an attribute to every row depending on data I get.
I want to apply the same thing to the opened child table (I know that i cannot search/filter child tables when they are not open), but I always get the error, that I cannot draw the child table.

Screenshot of the Website for better understanding

The parent table ist filtered and in the state in which the site on the picture is I want the second row of the child table also not visible/filtered.

This is the code used to build the tables.

  var build_table = $('#build_table').DataTable({
    "ajax":{
            "type": "post",
            "data": {'post_release': release_value, 'post_responsible': responsible_value},
            "url":"get_init.php",   //Alternative get.php
            "dataSrc" : ""
    },
    paging: false,
    autoWidth: true,
    columns: [{
      className: 'term-details-control',
      orderable: false,
      data: null,
      defaultContent: '<img src="https://pics.freeicons.io/uploads/icons/png/9322424801588529853-24.png">'
    },             
        { data: "WDM_GMRE" },
        { data: "OCS_GMRE" },
        { data: "PSIM_GMRE" },
        { data: "WDM_NE" },
        { data: "OCS_NE" },
        { data: "PSIM_NE" },
        { data: "tests_total"  ,
                render: function ( data, type, row ) {
                    if (row.tests_failed > 2) {
                        return '<span class="dot" style="height: 20px; width: 20px; background-color: red; border-radius: 25%; display: inline-block;"></span>  ' + data + " / " + row.tests_passed + " / " + row.tests_failed;
                    } else {
                        return '<span class="dot" style="height: 20px; width: 20px; background-color: green; border-radius: 25%; display: inline-block;"></span>  ' + data + " / " + row.tests_passed + " / " + row.tests_failed;
                    }
                }
        },
        { data: "WDM_tests" ,
            render: function ( data, type, row) {
                    return data;
            }
        },
        { data: "MRN_tests" ,
            render: function ( data, type, row) {
                    return data;
            }
        },
        { data: "green_succ", 
            render: function ( data, type, row ) {
                return data + '% successfull'
            }
        },
        { data: "ess_succ", 
            render: function ( data, type, row ) {
                return '<progress value="' + data + '" max="100"></progress>'
            }
        }
    ], 
      "columnDefs": [
    { "searchable": true, "targets": 1 }
  ],
    rowId: 'PK_comb_ID',
    createdRow: function (tr, data) {
        if ( data.b_SIM && data.b_HW == 1 ) {
            $(tr).attr('banned', '0');
        } else if (data.b_SIM == 1) {
            $(tr).attr('banned', '1');
        } else {
            $(tr).attr('banned', '2')
        }
    },

    order: [
      [1, 'desc']
    ]
  
});

//Filter parent table
$('.filter_type').on('change', function() { 
    $.fn.dataTable.ext.search.push(
           function(settings, data, dataIndex) {
               if ($('#check4').prop('checked') && $('#check5').prop('checked')) {
                return $(build_table.row(dataIndex).node()).attr('banned');
               } else if ($('#check4').prop('checked')) {
                return $(build_table.row(dataIndex).node()).attr('banned') == 0 || $(build_table.row(dataIndex).node()).attr('banned') == 2;                
               } else if ($('#check5').prop('checked')) {
                return $(build_table.row(dataIndex).node()).attr('banned') == 0 || $(build_table.row(dataIndex).node()).attr('banned') == 1;
               }
           }
        );
        build_table.draw();
    $.fn.dataTable.ext.search.pop();    
})

  // Add event listener for opening and closing details
  $('#build_table tbody').on('click', 'td.term-details-control', function() {
    var tr = $(this).closest('tr');
    var row = build_table.row(tr);

    if (row.child.isShown()) {
      // This row is already open - close it
      row.child.hide();
      tr.removeClass('shown');
      $('.odd img, .even img').attr('src', 'https://pics.freeicons.io/uploads/icons/png/9322424801588529853-24.png');
    } else {
      // Open this row
      
      var te = $(this).closest('tr').attr('id');
      row.child(formatTerm(te)).show();
          tr.addClass('shown');   
      $('.odd.shown img, .even.shown img').attr('src', 'https://pics.freeicons.io/uploads/icons/png/6275201171582779176-20.png');

      var tests_table = $('#tests_table' + te).dataTable({
        dom: 'Qfrtip',  
        "ajax":{
            "type": "post",
            "data": {'post_release': release_value, 'post_id': te},
            "url":"get.php",
            "dataSrc" : ""
        },
        paging: false,
        searching: true,
        columns: [{
          orderable: true,
          defaultContent: ''
        }, 
                
        { data: "test_name"  ,
                render: function ( data, type, row) {
                    return '<a target="_blank" href="' + row.test_url + '">' + data + '</a>';                   
                }
            },
        { data: "CSL" },
        { data: "tests_total" },
        
        { data: "tests_passed" },
        
        { data: "tests_failed" },
        { data: "Test_Datetime" }

        ],
        createdRow: function (tr, data) {
            if ( data.b_Green == 1 ) {
                $(tr).addClass('green');
            }
         },
            createdRow: function (tr, data) {
        if ( data.b_SIM == 1 ) {
            $(tr).attr('banned_', '1');
        } else {
            $(tr).attr('banned_', '0');
        }
    },
        order: [
          [6, 'desc']
        ]
    })          
  });
      
      counter += 1; 
//Try to filter the child table(s) but with this getting the error "tests_table.draw(); not a function"
                $('.filter_type').on('change', function() {
                    $.fn.dataTable.ext.search.push(
                           function(settings, data2, dataIndex) {
                               if ($('#check4').prop('checked') && $('#check5').prop('checked')) {
                                return $(tests_table.row(dataIndex).node()).attr('banned_');
                               } else if ($('#check4').prop('checked')) {
                                return $(tests_table.row(dataIndex).node()).attr('banned_') == 0;
                               } else if ($('#check5').prop('checked')) {
                                return $(tests_table.row(dataIndex).node()).attr('banned_') == 1;
                               }
                           }
                        );

                        tests_table.draw();
                        $.fn.dataTable.ext.search.pop();
   
    }
  });
  

  


}

function formatTerm(table_id) {
  return '<table class="child_table" id="tests_table' + table_id + '">' +
    '<thead><tr><th></th><th>Test Name</th><th>Responsible</th><th>Tests Total</th><th>Tests Passed</th><th>Tests Failed</th><th>Datetime</th></tr></thead></table>';
}

If this way of filtering is possible in any way, I am looking forward to any help.