How to ensure Preferred Employee Name is shown in the Company Directory

Company Directory, by default shown Employees primary name.

In order to show Preferred Name instead of Primary Name in the Company Directory, I carried out the change in Application Package level HRCD_COMPANY_DIRECTORY_FL:UI:CDMain and updated the Org Tree Profile Map where I replaced delivered PERSON_NAME(shows primary name of Employees) with Custom record(shows Preferred name of Employees).

The change was reflected on the profile page but on the search page inspite of the above changes primary name is still shown, please advise!