Query Builder's insert method return type

I just checked the system code and it does return false or it returns the result, for CodeIgniter 4.1.1.

In my case (delete()) this is not true.

I am using 4.1.1 & ENVIRONMENT=production (DBDebug=false)

PHP Code:

$this->db = Database::connect();
$this->db->transBegin();
$this->builder = $this->db->table("SOMETABLE");
$this->builder->where('ID', NULL);
$result = $this->builder->delete(); 


$result constains:

Code:

CodeIgniter\Database\MySQLi\Result::__set_state(array(
  'connID' =>
  mysqli::__set_state(array(
    'affected_rows' => NULL,
    'client_info' => NULL,
    'client_version' => NULL,
    'connect_errno' => NULL,
    'connect_error' => NULL,
    'errno' => NULL,
    'error' => NULL,
    'error_list' => NULL,
    'field_count' => NULL,
    'host_info' => NULL,
    'info' => NULL,
    'insert_id' => NULL,
    'server_info' => NULL,
    'server_version' => NULL,
    'stat' => NULL,
    'sqlstate' => NULL,
    'protocol_version' => NULL,
    'thread_id' => NULL,
    'warning_count' => NULL,
  )),
  'resultID' => true,
  'resultArray' =>
  array (
  ),
  'resultObject' =>
  array (
  ),
  'customResultObject' =>
  array (
  ),
  'currentRow' => 0,
  'numRows' => NULL,
  'rowData' => NULL,
));

$this->db->error() contains:

Code:

array (
  'code' => 0,
  'message' => '',
);