My category title and description is not updated with the data of an applied filter. Am I missing something?

First of all, please make sure that the attribute option has the data specified under attribute settings here:

Category data will be modified with it.

Secondly, please make sure that the attribute is allowed to update category data and specify how it should be added under general extension settings here:

With the above settings in place, the category data must be updated upon filtration.

There are cases when title and description blocks are moved in the theme from their default location, in this case our developers will try to help you achieve the needed result via a support ticket.