diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs
index c0e2f8e..dff8e2d 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs
@@ -211,7 +211,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        private double _itemHeight = 65;       
+        private double _itemHeight = 65;
         [CanDo]
         [Browsable(true)]
         public double ItemHeight
@@ -228,7 +228,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     RaisePropertyChanged(nameof(PhysicalItemHeight));
                 }
             }
-        }       
+        }
 
         [DisplayName("ItemWidth(mm)")]
         [Browsable(true)]
@@ -444,7 +444,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 return new PointBase(Left, Top);
             }
-        }  
+        }
 
         [CanDo]
         public PointBase TopLeft
@@ -746,7 +746,12 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             if (isInnerPoint)
             {
-                return this.Connectors.Where(p => p.XRatio == xRatio && p.YRatio == yRatio).FirstOrDefault();
+                var connector = Connectors.FirstOrDefault(p => p.XRatio == xRatio && p.YRatio == yRatio);
+                if (connector == null)
+                {
+                    connector = Connectors.FirstOrDefault(p => p.Id == connectorId);
+                }
+                return connector;
             }
             else if (isPortless)
             {