diff --git a/AIStudio.Wpf.DiagramDesigner/UserControls/LineControl.xaml.cs b/AIStudio.Wpf.DiagramDesigner/UserControls/LineControl.xaml.cs
index 95bf3c2..e3099f1 100644
--- a/AIStudio.Wpf.DiagramDesigner/UserControls/LineControl.xaml.cs
+++ b/AIStudio.Wpf.DiagramDesigner/UserControls/LineControl.xaml.cs
@@ -33,6 +33,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             if (this.DataContext is ConnectionViewModel connector && connector.AnimationViewModel != null)
             {
                 connector.AnimationViewModel.PropertyChanged -= Connector_PropertyChanged;
+                connector.PropertyChanged -= Connector_PropertyChanged;
             }
             _story?.Stop();
         }
@@ -43,6 +44,8 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 connector.AnimationViewModel.PropertyChanged -= Connector_PropertyChanged;
                 connector.AnimationViewModel.PropertyChanged += Connector_PropertyChanged;
+                connector.PropertyChanged -= Connector_PropertyChanged;
+                connector.PropertyChanged += Connector_PropertyChanged;
             }
             this.ball.Visibility = Visibility.Collapsed;
             await DoAnimation();
@@ -54,6 +57,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 case nameof(AnimationViewModel.Animation):
                 case nameof(AnimationViewModel.Duration):
+                case "PathGeneratorResult":
                     await DoAnimation();
                     break;
                 case nameof(AnimationViewModel.Start):