Fix a possible duplication bug

src/main/java/com/Acrobot/ChestShop/Listeners/Player/PlayerTeleport.java

@@ -0,0 +1,17 @@
+package com.Acrobot.ChestShop.Listeners.Player;
+
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerTeleportEvent;
+
+/**
+ * A fix for a CraftBukkit bug.
+ * @author Acrobot
+ */
+public class PlayerTeleport implements Listener {
+
+    @EventHandler
+    public static void onPlayerTeleport(PlayerTeleportEvent event) {
+        event.getPlayer().closeInventory();
+    }
+}