Datatables Server Side Filtering Wrong When Have Space Character

Hello i create datatables serverside with PHP, but filtering result is wrong.
i want to show only 1 data, when i filter “epic 5” but the result show 5 data.
You can check my screenshot here : https://i.ibb.co.com/4RnRcwLg/Screenshot-1.png

When i debug SQL code show like this. Why datatables split my filtering?

SELECT
    `rank_star`.*,
    `rk`.`rank_name`,
    `usr`.`employee_username` 
FROM
    `rank_star`
    LEFT JOIN `rank` AS `rk` ON `rk`.`id_rank` = `rank_star`.`id_rank`
    LEFT JOIN `employee` AS `usr` ON `usr`.`employee_id` = `rank_star`.`created_by`
    LEFT JOIN `employee` AS `usr_up` ON `usr_up`.`employee_id` = `rank_star`.`updated_by` 
WHERE
    (
        LOWER( `rk`.`rank_name` ) LIKE % epic % 
        OR LOWER( `rank_star`.`rank_name_star` ) LIKE % epic % 
        OR LOWER( `rank_star`.`rank_star_order` ) LIKE % epic % 
        OR LOWER( `rank_star`.`created_at` ) LIKE % epic % 
        OR LOWER( `rank_star`.`updated_at` ) LIKE % epic % 
        OR LOWER( `usr`.`employee_username` ) LIKE % epic % 
    OR LOWER( `usr_up`.`employee_username` ) LIKE % epic %) 
    AND (
        LOWER( `rk`.`rank_name` ) LIKE % 5 % 
        OR LOWER( `rank_star`.`rank_name_star` ) LIKE % 5 % 
        OR LOWER( `rank_star`.`rank_star_order` ) LIKE % 5 % 
        OR LOWER( `rank_star`.`created_at` ) LIKE % 5 % 
        OR LOWER( `rank_star`.`updated_at` ) LIKE % 5 % 
        OR LOWER( `usr`.`employee_username` ) LIKE % 5 % 
    OR LOWER( `usr_up`.`employee_username` ) LIKE % 5 %) 
ORDER BY
    `rank_star`.`rank_star_order` ASC 
    LIMIT 100 OFFSET 0

This is my javasript code

$(document).ready(function(){
    $("#example").DataTable({
        search: { "bSmart": false, "bRegex": true },
        serverSide : true,
        processing : true,
        ajax : {
            url : "rank_star/res",
            type : 'POST',
            dataType : 'JSON',
            data : {_token : '{{csrf_token()}}'}
        },
        columns : [
            {data : 'act', name : 'act'},
            {data : 'rank_name', name : 'rk.rank_name'},
            {data : 'rank_name_star', name : 'rank_star.rank_name_star'},
            {data : 'rank_min_star', name : 'rank_min_star',className: "text-center"},
            {data : 'rank_max_star', name : 'rank_max_star',className: "text-center"},
            {data : 'rank_star_order', name : 'rank_star.rank_star_order',className: "text-center"},
            {data : 'created_date', name : 'created_at'},
            {data : 'updated_date', name : 'updated_at'},
            {data : 'employee_add', name : 'usr.employee_username'},
            {data : 'employee_update', name : 'usr_up.employee_username'},
        ],
        pageLength: 100,
        order: [[5, 'asc']],
    });
});

And this is my PHP Code

$data = RankStar::query()->select(
                                [
                                 'rank_star.*',
                                 'rk.rank_name',
                                 'usr.employee_username',
                                ]
                            )
                            ->leftJoin('rank as rk', 'rk.id_rank', '=', 'rank_star.id_rank')
                            ->leftJoin('employee as usr', 'usr.employee_id', '=', 'rank_star.created_by')
                            ->leftJoin('employee as usr_up', 'usr_up.employee_id', '=', 'rank_star.updated_by');
        return datatables()->eloquent($data)
        ->addColumn("act", function($row){

            $func_action ="";
            $btn_edit    = "<button type='button' title='Update' class='btn btn-primary btn-sm' onclick='do_edit("".$row->id_rank_star."")' data-toggle='modal' data-target='#update_modal'><i class='fa fa-pencil'></i></button>&nbsp;";
            $btn_delete  = "<button type='button' title='Delete' class='btn btn-danger btn-sm' onclick='do_delete("".$row->id_rank_star."")'><i class='fa fa-trash'></i></button>";
            
            if(acc_update(Session::get('ses_level'),$this->data['id_menu']) == '1'){
                     $func_action .= $btn_edit;
            }

            if(acc_delete(Session::get('ses_level'),$this->data['id_menu']) == '1'){
                    $func_action .= $btn_delete;
            }

            return "<center>".$func_action."</center>"; 
        })
        ->addColumn("rank_name", function($row){
            return @$row->rank_name;
        })
        ->addColumn("rank_name_star", function($row){
            return @$row->rank_name_star;
        })
        ->addColumn("rank_min_star", function($row){
            return @$row->rank_min_star;
        })
        ->addColumn("rank_max_star", function($row){
            return @$row->rank_max_star;
        })
        ->addColumn("rank_star_order", function($row){
            return @$row->rank_star_order;
        })
        ->addColumn("employee_add", function($row){
            return @$row->creator->employee_username;
        })
        ->addColumn("employee_update", function($row){
            return @$row->updater->employee_username;
        })
        ->addColumn("created_date", function($row){
            return get_date_indonesia($row->created_at)." ".substr($row->created_at, 10, 9);
        })
        ->addColumn("updated_date", function($row){
            return get_date_indonesia($row->updated_at)." ".substr($row->updated_at, 10, 9);
        })
        ->rawColumns(['act'])
        ->make(true);

Help me sir, thanks.