diff --git a/app-ui/src/main/java/com/mercury/platform/ui/frame/MovableComponentFrame.java b/app-ui/src/main/java/com/mercury/platform/ui/frame/MovableComponentFrame.java
index 4fec66f1..c34118f4 100644
--- a/app-ui/src/main/java/com/mercury/platform/ui/frame/MovableComponentFrame.java
+++ b/app-ui/src/main/java/com/mercury/platform/ui/frame/MovableComponentFrame.java
@@ -11,7 +11,7 @@
 
 public abstract class MovableComponentFrame extends ComponentFrame {
     protected Container mainContainer;
-    private FrameConstraints prevConstraints;
+    protected FrameConstraints prevConstraints;
     protected UndecoratedFrameState moveState = UndecoratedFrameState.DEFAULT;
     protected boolean locationWasChanged = false;
     protected boolean sizeWasChanged = false;
diff --git a/app-ui/src/main/java/com/mercury/platform/ui/frame/impl/ItemsGridFrame.java b/app-ui/src/main/java/com/mercury/platform/ui/frame/impl/ItemsGridFrame.java
index 92de9425..4375fcd1 100644
--- a/app-ui/src/main/java/com/mercury/platform/ui/frame/impl/ItemsGridFrame.java
+++ b/app-ui/src/main/java/com/mercury/platform/ui/frame/impl/ItemsGridFrame.java
@@ -83,12 +83,12 @@ protected void initialize() {
         this.setPreferredSize(this.getMaximumSize());
         this.pack();
     }
+
     private ItemCell getGridCell(int x, int y){
         JPanel cellPanel = new JPanel();
         cellPanel.setOpaque(true);
         cellPanel.setBackground(AppThemeColor.TRANSPARENT);
-        ItemCell cell = new ItemCell(x+1,y+1,cellPanel);
-        return cell;
+        return new ItemCell(x+1,y+1,cellPanel);
     }
 
     private JPanel getHeaderPanel(){
@@ -125,6 +125,7 @@ public void initHandlers() {
                         }
                         navBar.add(cellHeader);
                         tabButtons.put(nickname + message.getTabName(), cellHeader);
+                        repaint();
                         pack();
                     }
                 }
@@ -225,6 +226,14 @@ private void closeGridItem(ItemMessage message) {
         }
     }
 
+    @Override
+    protected void onLock() {
+        super.onLock();
+        if(navBar.getComponentCount() > 0){
+            this.setVisible(true);
+        }
+    }
+
     @Override
     protected JPanel panelWhenMove() {
         JPanel panel = componentsFactory.getTransparentPanel(new BorderLayout());