Change header label for User-defined Fields

Hi,

I had created new custom User-defined Fields, and updated the Screen Set.

In the Screet Set, the new section where custom field are displayed, had been updated the label, however when running the screen, would display as title "User-defined Fields" instead of the label entered in the Screen Set.

Screen Set has been set to inactive, active again, and system would ignore the label and display "User-defined Fields"

How can this be updated?