SpigotCore_Main/src/de/steamwar/comms/BungeeReceiver.java

@@ -24,7 +24,7 @@ import com.google.common.io.ByteStreams;
 import de.steamwar.comms.handlers.BungeeHandler;
 import de.steamwar.comms.handlers.InventoryHandler;
 import de.steamwar.core.Core;
-import de.steamwar.sql.SteamwarUser;
+import de.steamwar.sql.*;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.messaging.PluginMessageListener;

SpigotCore_Main/src/de/steamwar/comms/handlers/InventoryHandler.java

@@ -23,11 +23,13 @@ import com.google.common.io.ByteArrayDataInput;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
+import de.steamwar.core.Core;
 import de.steamwar.inventory.SWInventory;
 import de.steamwar.inventory.SWItem;
 import de.steamwar.sql.SteamwarUser;
 import org.bukkit.Bukkit;
 import de.steamwar.comms.packets.*;
+import org.bukkit.event.inventory.InventoryType;
 
 import java.util.*;
 
@@ -45,12 +47,19 @@ public class InventoryHandler implements BungeeHandler {
         for (int i = 0; i < length; i++) {
             JsonObject itemJson = array.get(i).getAsJsonObject();
             SWItem item = SWItem.getItemFromJson(itemJson);
-            item.setCallback(click -> new InventoryCallbackPacket(itemJson, click, player).send(Bukkit.getPlayer(player)));
+            item.setCallback(click -> {
+                new InventoryCallbackPacket(itemJson, click, player).send(Bukkit.getPlayer(player));
+            });
             items.put(itemJson.get("position").getAsInt(), item);
         }
 
         SWInventory inventory = new SWInventory(Bukkit.getPlayer(player), size, title, items);
-        inventory.addCloseCallback(click -> new InventoryCallbackPacket(player).send(Bukkit.getPlayer(player)));
+        inventory.addCloseCallback(click -> {
+            Bukkit.getScheduler().runTaskLaterAsynchronously(Core.getInstance(), () -> {
+                if(Bukkit.getPlayer(player).getOpenInventory().getType() != InventoryType.CHEST)
+                    new InventoryCallbackPacket(player).send(Bukkit.getPlayer(player));
+            }, 1);
+        });
         inventory.open();
     }
 }

SpigotCore_Main/src/de/steamwar/inventory/SWItem.java

@@ -138,7 +138,7 @@ public class SWItem {
                         itemJson.has("color")?itemJson.get("color").getAsByte():0,
                         itemJson.get("title").getAsString());
             }else {
-                item = new SWItem(Material.valueOf(itemJson.get("material").getAsString()), itemJson.get("title").getAsString());
+                item = new SWItem(SWItem.getMaterial(itemJson.get("material").getAsString()), itemJson.get("title").getAsString());
             }
         }catch (IllegalArgumentException e) {
             item = new SWItem(Material.STONE, itemJson.get("title").getAsString());