diff --git a/change_log.txt b/change_log.txt
index 9c6f8dd7..7137e427 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -1,4 +1,8 @@
 ===== 3.1.31-dev ===== (xx.xx.xx)
+ 27.09.2016
+  - bugfix when Smarty does use an internally cached template object on Smarty::fetch() calls
+           the template and config variables must be cleared https://github.com/smarty-php/smarty/issues/297
+           
  20.09.2016
   - bugfix some $smarty special template variables are no longer accessed as real variable.
     using them on calls like {if isset($smarty.foo)} or {if empty($smarty.foo)} will fail
diff --git a/libs/Smarty.class.php b/libs/Smarty.class.php
index 6f7937fa..21015fc8 100644
--- a/libs/Smarty.class.php
+++ b/libs/Smarty.class.php
@@ -114,7 +114,7 @@ class Smarty extends Smarty_Internal_TemplateBase
     /**
      * smarty version
      */
-    const SMARTY_VERSION = '3.1.31-dev/29';
+    const SMARTY_VERSION = '3.1.31-dev/30';
 
     /**
      * define variable scopes
@@ -1120,6 +1120,7 @@ class Smarty extends Smarty_Internal_TemplateBase
             $tpl->tpl_vars = $tpl->config_vars = array();
         } else if (!$do_clone && isset($this->_cache[ 'tplObjects' ][ $_templateId ])) {
             $tpl = clone $this->_cache[ 'tplObjects' ][ $_templateId ];
+            $tpl->tpl_vars = $tpl->config_vars = array();
         } else {
             /* @var Smarty_Internal_Template $tpl */
             $tpl = new $this->template_class($template, $this, null, $cache_id, $compile_id, null, null);