在REST服务响应中缺少json字符 - GuzzleHttp

I'm using GuzzleHttp to comunicate with a local rest API. But in some cases the response is incomplete. is missing some last characters. the answer right in json format, and how missing some characters can not convert it. the strange thing is to test the API in the browser the response is complete.

<?php

class A {
    protected $client;

    public function __construct()
    {
        $this->client = new \GuzzleHttp\Client([
            'base_uri' => 'https://localhost:8443/restcomponent/notes/',
            'timeout'  => 2.0,
            'verify' => false
        ]);

        $this->transformer = new RestNoteTransformer();
    }

    /**
     * @param string $httpMethod
     * @param string $path
     * @param array $options
     * @return mixed|\Psr\Http\Message\ResponseInterface
     */
    protected function request($httpMethod = 'GET', $path = '', array $options = [])
    {
        $options = array_merge($options, [
            'headers' => [
                'login.username' => 'admin',
                'login.password' => 'ofbiz',
            ]
        ]);

        return $this->client->request($httpMethod, $path, $options);
    }

    /**
     * Find user notes
     *
     * @param int $userId
     * @param int $page
     * @return Collection
     */
    public function getNotesByUser($userId, $page = 1)
    {
        $response = $this->request('GET', '?page=' . $page . '&nReg=' . self::NUM_REGS . '&user=' . $userId);
        $contents = $response->getBody()->getContents();
        $dto = json_decode($contents, false);

        var_dump($contents, $dto);
    }
}

example of response:

[{"noteTitle":"EDOM: Trabalho: Entrega 1","lastUpdatedStamp":1452462860644,"createdTxStamp":1452462860642,"createdStamp":1452462860644,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452462860642,"noteId":"10038","Latitude":"41.101273400000004","media":"","userId":"1","Longitude":"-8.6503474","noteType":"text","text":"sdfjkjhg
hjkkkhjgchjlkçkhj
hvnklçljgbhjkkhghjkhhjllkhghj","_DELEGATOR_NAME_":"default"},{"noteTitle":"EDOM: Trabalho: Entrega 1","lastUpdatedStamp":1452462985812,"createdTxStamp":1452462985809,"createdStamp":1452462985812,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452462985809,"noteId":"10039","Latitude":"41.101273400000004","media":"","userId":"1","Longitude":"-8.6503474","noteType":"text","text":"sdfjkjhg
hjkkkhjgchjlkçkhj
hvnklçljgbhjkkhghjkhhjllkhghj","_DELEGATOR_NAME_":"default"},{"noteTitle":"EDOM: Trabalho: Entrega 1","lastUpdatedStamp":1452462992254,"createdTxStamp":1452462992250,"createdStamp":1452462992254,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452462992250,"noteId":"10040","Latitude":"41.101273400000004","media":"","userId":"1","Longitude":"-8.6503474","noteType":"text","text":"sdfjkjhg
hjkkkhjgchjlkçkhj
hvnklçljgbhjkkhghjkhhjllkhghj","_DELEGATOR_NAME_":"default"},{"noteTitle":"EDOM: Trabalho: Entrega 1","lastUpdatedStamp":1452463164627,"createdTxStamp":1452463164626,"createdStamp":1452463164627,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452463164626,"noteId":"10046","Latitude":"41.101273400000004","media":"","userId":"1","Longitude":"-8.6503474","noteType":"text","text":"sdfjkjhg
hjkkkhjgchjlkçkhj
hvnklçljgbhjkkhghjkhhjllkhghj","_DELEGATOR_NAME_":"default"},{"noteTitle":"EDOM: Trabalho: Entrega 1","lastUpdatedStamp":1452463249756,"createdTxStamp":1452463249755,"createdStamp":1452463249756,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452463249755,"noteId":"10047","Latitude":"41.101273400000004","media":"","userId":"1","Longitude":"-8.6503474","noteType":"text","text":"sdfjkjhg
hjkkkhjgchjlkçkhj
hvnklçljgbhjkkhghjkhhjllkhghj","_DELEGATOR_NAME_":"default"},{"noteTitle":"EDOM: Trabalho: Entrega 1","lastUpdatedStamp":1452463284029,"createdTxStamp":1452463284027,"createdStamp":1452463284029,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452463284027,"noteId":"10048","Latitude":"41.101273400000004","media":"","userId":"1","Longitude":"-8.6503474","noteType":"text","text":"sdfjkjhg
hjkkkhjgchjlkçkhj
hvnklçljgbhjkkhghjkhhjllkhghj","_DELEGATOR_NAME_":"default"},{"noteTitle":"EDOM: Trabalho: Entrega 1","lastUpdatedStamp":1452463309824,"createdTxStamp":1452463309822,"createdStamp":1452463309824,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452463309822,"noteId":"10049","Latitude":"41.101273400000004","media":"","userId":"1","Longitude":"-8.6503474","noteType":"text","text":"sdfjkjhg
hjkkkhjgchjlkçkhj
hvnklçljgbhjkkhghjkhhjllkhghj","_DELEGATOR_NAME_":"default"},{"noteTitle":"Retrieve data from webservice","lastUpdatedStamp":1452463392692,"createdTxStamp":1452463392690,"createdStamp":1452463392692,"_ENTITY_NAME_":"Note","lastUpdatedTxStamp":1452463392690,"noteId":"10050","Latitude":"41.1012888","media":"","userId":"1","Longitude":"-8.6503467","noteType":"text","text":"kjhfcvghjkm
jnbhjmlmkh
nhbhjkjhv","_DELEGATOR_NAME