firebase有时会返回FCM令牌作为InvalidRegistration /未注册，即使该令牌有效

Question

我创建了一个面板来发送android的数据消息推送通知。我注意到一种行为，有时对于相同的设备令牌FCM，返回错误消息为无效注册/未注册，但是有时，它发送通知并返回成功。

我正在使用curl发送通知。下面是我的代码：

<?php
    // put your code here
    $path_to_firebase_cm = 'https://fcm.googleapis.com/fcm/send'; 
    $headers = array(
            'Authorization:key=' . $this->config->item('API_ACCESS_KEY'),
            'Content-Type:application/json'
    );
    $batch_of_1000_user_ids = array(
            'tokenXXXXXX1',
            'tokenXXX2'
    );
    $fields = array(
            'data' => array(
                'id' => $article_id,
                'author' => $author,
                'title' => $title,
                'description' => $desc,
                'url' => $url,
                'publishedAt' => $publishedAt,
                'source' => $source,
                'urlToImage' => $urltoImage,
                'category' => $categories
                ),
            'registration_ids' => $batch_of_1000_user_ids
    );

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $path_to_firebase_cm); 
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 ); 
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
    $result = curl_exec($ch);
    if ($result === FALSE) {
            die('Curl failed: ' . curl_error($ch));
    }
    curl_close($ch);
    ?>