Actually, the feature you are talking about is for the X theme and not the Pro theme. There is a section in the header section of the X theme which renders the category title. For example:
Now if you go to Pro > Headers and unassign all the pages from the header that you added, and it causes the default header rendered, you will see that the title will come back.
There is a workaround regarding this. You can add a shortcode which contains the title information and adds it to the header inside a content area element.
Please read some of the answers here which suggest that you add a shortcode called
You will need to have the Child Theme installed.