Index: lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/web/controller/MonitoringController.java
===================================================================
diff -u -rfde80ab63005d915b198faa4ca9806186240a65b -r94c22f07fdd57d3e9279cb754909bb3dbe0bc0ee
--- lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/web/controller/MonitoringController.java	(.../MonitoringController.java)	(revision fde80ab63005d915b198faa4ca9806186240a65b)
+++ lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/web/controller/MonitoringController.java	(.../MonitoringController.java)	(revision 94c22f07fdd57d3e9279cb754909bb3dbe0bc0ee)
@@ -282,7 +282,7 @@
 		log.error(e);
 	    }
 	    return chartData;
-	});
+	}).distinctUntilChanged();
     }
 
     private String getCompletionChartsData(long toolContentId) throws JsonProcessingException, IOException {