fix:

Views/UserControl/Viewport3D.xaml.cs

@@ -203,7 +203,7 @@ public partial class Viewport3D
                 //camera.UpDirection = new Vector3D(0, -1, 0);    
                 //camera.LookDirection = new Vector3D(center.X -  camera.Position.X, center.Y -  camera.Position.Y, center.Z -  camera.Position.Z);
                 var center = ViewportManager.ModelBounds.Center;
-                ViewportManager.ClearMeshLines(ViewportRightMenuShowMeshLines);
+                ViewportManager.ClearMeshLines();
                 var maxDimension = ViewportManager.ModelBounds.Size.Length();
                 var distance = maxDimension * 1.2; // 调整相机到模型的距离，保证视野范围内
                 var camera = Viewport3Dx.Camera as HelixToolkit.Wpf.SharpDX.OrthographicCamera;

Views/UserControl/ViewportData/Helper/ViewportHelperPro.cs

@@ -901,6 +901,7 @@ public class ViewportHelperPro
     {
         ViewportManager.GetViewport().ViewportRightMenuShowModelFaceByType.IsChecked = false;
         ViewportManager.ClearDicModels();
+        ViewportManager.ClearMeshLines();
         ViewportManager.DoubleClickSelect = false;
 
         // 设置旋转的中心点和旋转轴

Views/UserControl/ViewportData/Helper/ViewportManager.cs

@@ -501,11 +501,11 @@ public class ViewportManager
         }
     }
 
-    public static void ClearMeshLines(MenuItem menuItem)
+    public static void ClearMeshLines()
     {
         ViewportManager.ShowMeshLines(false, true);
         ViewportManager.ShowMeshLines(false, false);
-        menuItem.IsChecked = false;
+        ViewportManager.GetViewport().ViewportRightMenuShowMeshLines.IsChecked = false;
     }
     #endregion