Solved Multiple StatsWindow instances created when clicking the "Display statistics" button repeatedly (#4558)

Author: SujoyBose

js/activity.js

@@ -5784,7 +5784,9 @@ class Activity {
         };
 
         const doAnalytics = (activity) => {
-            activity.statsWindow = new StatsWindow(activity);
+            if (!activity.statsWindow || !activity.statsWindow.isOpen) {
+                activity.statsWindow = new StatsWindow(activity);
+            }
         };
 
         /*