When multiple Context Text Field Editor widgets are added to a single Rally Custom View, updating the text in one widget instance automatically applies the same text to all other instances of that widget on the page.
Rally SaaS
This behavior is Working as Designed. The Context Text Field Editor widget is designed to display and edit content from the Project's Notes or Description fields. Because this data is persisted at the Project level, it is not scoped to individual widget instances. If multiple widgets are configured to point to the same project-level field, they will naturally display and update the same data.
Since the widget is designed to show project-persistent data, unique content cannot be maintained by simply adding multiple instances of this specific widget to a single view.