We just updated our environment to 24.2.4. I tried the syntax of isNew() OR isDirty() but it looks like it only hides the markdown text entry regardless if it meets this condition or not.
This is on the Invoice assistant of the Customer Page (CustomerInfo form).
See below:

Note: If I changed the Visible condition to just toggle to “true”, it is showing (when no conditions applied). See below:

Am I missing something? Or Would there be another syntax to show the Markdown Text for child record (in this case, the Customer Invoice child record).
Thanks!