fix: Location (setWorld)

proto_1.12.2_netty/src/main/java/mc/core/network/proto_1_12_2/netty/handlers/PlayHandler.java

@@ -83,7 +83,7 @@ public class PlayHandler extends AbstractStateHandler implements PlayStateHandle
                 packet.getX(), packet.getY(), packet.getZ(),
                 player.getLocation().getYaw(),
                 player.getLocation().getPitch(),
-                null
+                player.getLocation().getWorld()
         ));
         EventBusGetter.INSTANCE.post(event);
     }