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

@@ -76,6 +76,7 @@ public class SWAnvilInv {
     }
 
     public void open() {
+        player.setLevel(1);
         builder.open(player);
     }
 
@@ -83,6 +84,7 @@ public class SWAnvilInv {
         if(s.startsWith("»"))
             s = s.substring(1);
         callback.accept(s);
+        player.setLevel(0);
         return Collections.singletonList(AnvilGUI.ResponseAction.close());
     }
 }