Merge pull request MicrosoftDocs#3762 from MicrosoftDocs/stjanovi-patch-8

Add note to addOnChange

Author: Nkrb

powerapps-docs/developer/model-driven-apps/clientapi/reference/attributes/addOnChange.md

@@ -21,6 +21,9 @@ search.app:
 
 Sets a function to be called when the **OnChange** event occurs.
 
+> [!NOTE]
+> If the `addOnChange` method is used on the form `OnLoad` event handler, you should ensure that it's called when necessary. You can use the [getEventArgs](../executioncontext/getEventArgs.md) to conditionally call the `addOnChange` method based on the data load state.
+
 ## Attribute types supported
 
 All