diff --git a/Editor/Helper/MetaDataHelper.cs b/Editor/Helper/MetaDataHelper.cs
index cac4f91..db9ea18 100644
--- a/Editor/Helper/MetaDataHelper.cs
+++ b/Editor/Helper/MetaDataHelper.cs
@@ -49,12 +49,6 @@ public class LWGUIMetaDatas
 		public Shader GetShader() => perShaderData.shader;
 
 		public MaterialEditor GetMaterialEditor() => perInspectorData.materialEditor;
-
-		public void OnValidate()
-		{
-			UnityEditorExtension.ApplyMaterialPropertyAndDecoratorDrawers(GetMaterialEditor()?.targets);
-			MetaDataHelper.ForceUpdateMaterialsMetadataCache(GetMaterialEditor()?.targets);
-		}
 	}
 
 	public class MetaDataHelper
diff --git a/Editor/LWGUI.cs b/Editor/LWGUI.cs
index d6ddfbc..15bd16d 100644
--- a/Editor/LWGUI.cs
+++ b/Editor/LWGUI.cs
@@ -185,11 +185,33 @@ public override void AssignNewShaderToMaterial(Material material, Shader oldShad
 				MetaDataHelper.ReleaseMaterialMetadataCache(material);
 		}
 
-		// Called after editing the material
+		public static void OnValidate(Object[] materials)
+		{
+			UnityEditorExtension.ApplyMaterialPropertyAndDecoratorDrawers(materials);
+			MetaDataHelper.ForceUpdateMaterialsMetadataCache(materials);
+		}
+		
+		// Called after edit in code
+		public static void OnValidate(LWGUIMetaDatas metaDatas)
+		{
+			OnValidate(metaDatas?.GetMaterialEditor()?.targets);
+			OnValidate(metaDatas?.GetMaterialEditor()?.targets);
+		}
+		
+		// Called after edit or undo
 		public override void ValidateMaterial(Material material)
 		{
 			base.ValidateMaterial(material);
-			metaDatas?.OnValidate();
+			// Undo
+			if (metaDatas == null)
+			{
+				OnValidate(new Object[] { material });
+			}
+			// Edit
+			else
+			{
+				OnValidate(metaDatas);
+			}
 		}
 	}
 } //namespace LWGUI
\ No newline at end of file
diff --git a/Editor/ShaderDrawer.cs b/Editor/ShaderDrawer.cs
index 5f2012e..7632dd3 100644
--- a/Editor/ShaderDrawer.cs
+++ b/Editor/ShaderDrawer.cs
@@ -1021,7 +1021,7 @@ public override void DrawProp(Rect position, MaterialProperty prop, GUIContent l
 				LwguiGradientWindow.CloseWindow();
 				prop.textureValue = newCreatedTexture;
 				OnCreateNewRampMap(prop.textureValue);
-				metaDatas.OnValidate();
+				LWGUI.OnValidate(metaDatas);
 			}
 
 			// Save gradient changes
@@ -1083,7 +1083,7 @@ void OnSwitchRampMapEvent(Texture2D newRampMap)
 				LwguiGradientWindow.CloseWindow();
 				prop.textureValue = newRampMap;
 				OnSwitchRampMap(prop.textureValue);
-				metaDatas.OnValidate();
+				LWGUI.OnValidate(metaDatas);
 			}
 		}
 	}
diff --git a/package.json b/package.json
index d7c74d8..e18fca5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.jasonma.lwgui",
-  "version": "1.19.4",
+  "version": "1.19.5",
   "displayName": "LWGUI",
   "description": "A Lightweight, Flexible, Powerful Shader GUI System for Unity.",
   "keywords": [