diff --git a/lib/classes/Session/Handler.class.php b/lib/classes/Session/Handler.class.php
index 95945869e7..d6b37b3448 100644
--- a/lib/classes/Session/Handler.class.php
+++ b/lib/classes/Session/Handler.class.php
@@ -710,7 +710,7 @@ class Session_Handler
       $rs[$k]['created_on'] = new DateTime($row['created_on']);
       $rs[$k]['lastaccess'] = new DateTime($row['lastaccess']);
       $rs[$k]['token'] = !!$row['token'];
-      $rs[$k]['usr_id'] = User_Adapter::getInstance($row['usr_id'], appbox::get_instance());
+      $rs[$k]['usr_id'] = User_Adapter::getInstance($row['usr_id'], appbox::get_instance(\bootstrap::getCore()));
 
       $datas = $geonames->find_geoname_from_ip($row['ip']);
 
diff --git a/lib/classes/User/Adapter.class.php b/lib/classes/User/Adapter.class.php
index 4fb4256405..2fc220f007 100644
--- a/lib/classes/User/Adapter.class.php
+++ b/lib/classes/User/Adapter.class.php
@@ -482,7 +482,7 @@ class User_Adapter implements User_Interface, cache_cacheableInterface
   {
     try
     {
-      $appbox  = appbox::get_instance();
+      $appbox  = appbox::get_instance(\bootstrap::getCore());
       $session = $appbox->get_session();
       $user    = User_Adapter::getInstance($session->get_usr_id(), $appbox);
 
@@ -1523,7 +1523,7 @@ class User_Adapter implements User_Interface, cache_cacheableInterface
 
   public static function updateClientInfos($app_id)
   {
-    $appbox  = appbox::get_instance();
+    $appbox  = appbox::get_instance(\bootstrap::getCore());
     $session = $appbox->get_session();
     if (!$session->is_authenticated())
 
@@ -1632,7 +1632,7 @@ class User_Adapter implements User_Interface, cache_cacheableInterface
   {
     try
     {
-      $appbox  = appbox::get_instance();
+      $appbox  = appbox::get_instance(\bootstrap::getCore());
       $session = $appbox->get_session();
 
       $sql  = "UPDATE usr SET create_db='0' WHERE create_db='1' AND usr_id != :usr_id";
@@ -1659,7 +1659,7 @@ class User_Adapter implements User_Interface, cache_cacheableInterface
   {
     $users = self::get_sys_admins();
 
-    $appbox = appbox::get_instance();
+    $appbox = appbox::get_instance(\bootstrap::getCore());
     $conn   = $appbox->get_connection();
 
     foreach ($appbox->get_databoxes() as $databox)
@@ -1717,7 +1717,7 @@ class User_Adapter implements User_Interface, cache_cacheableInterface
     $locale = 'en_GB';
     try
     {
-      $appbox   = appbox::get_instance();
+      $appbox   = appbox::get_instance(\bootstrap::getCore());
       $session  = $appbox->get_session();
       $registry = $appbox->get_registry();
       $locale   = $registry->get('GV_default_lng');
diff --git a/lib/classes/User/Query.class.php b/lib/classes/User/Query.class.php
index 0938a38551..50a6fe88f8 100644
--- a/lib/classes/User/Query.class.php
+++ b/lib/classes/User/Query.class.php
@@ -209,7 +209,7 @@ class User_Query implements User_QueryInterface
   {
     $this->sql_params = array();
 
-    $appbox  = appbox::get_instance();
+    $appbox  = appbox::get_instance(\bootstrap::getCore());
     $session = $appbox->get_session();
 
     $sql = '
diff --git a/lib/classes/cache/databox.class.php b/lib/classes/cache/databox.class.php
index 50bc397ba0..56b865aeda 100644
--- a/lib/classes/cache/databox.class.php
+++ b/lib/classes/cache/databox.class.php
@@ -17,7 +17,7 @@
  */
 class cache_databox
 {
-
+  protected static $refreshing = false;
   /**
    *
    * @param int $sbas_id
@@ -25,11 +25,18 @@ class cache_databox
    */
   public static function refresh($sbas_id)
   {
+    if(self::$refreshing)
+    {
+      return;
+    }
+
+    self::$refreshing = true;
+
     $databox = \databox::get_instance((int) $sbas_id);
 
     $date = new \DateTime('-3 seconds');
 
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance(\bootstrap::getCore());
 
     $registry = \registry::get_instance();
 
@@ -49,8 +56,9 @@ class cache_databox
     else
       $last_update = new \DateTime('-10 years');
 
-    if ($date <= $last_update || !$appbox->get_cache()->ping())
+    if ($date <= $last_update)
     {
+      self::$refreshing = false;
       return;
     }
 
@@ -136,6 +144,8 @@ class cache_databox
     $stmt->execute(array(':date' => $now));
     $stmt->closeCursor();
 
+    self::$refreshing = false;
+
     return;
   }
 
diff --git a/lib/classes/caption/field.class.php b/lib/classes/caption/field.class.php
index a28aeacf05..27636150cc 100644
--- a/lib/classes/caption/field.class.php
+++ b/lib/classes/caption/field.class.php
@@ -247,7 +247,7 @@ class caption_field
    */
   public function highlight_thesaurus()
   {
-    $appbox   = appbox::get_instance();
+    $appbox   = appbox::get_instance(\bootstrap::getCore());
     $session  = $appbox->get_session();
     $registry = $appbox->get_registry();
     $unicode  = new unicode();