Search for Position using incumbent last name

Summary:

Is it possible to search for a Position on Position Details screen using Last Name of the incumbent? The search is working when we use Incumbent first name but not last name

Content (please ensure you mask any confidential information):

First Name search

Last Name Search

Version (include the version you are using, if applicable):

23D

Code Snippet (add any code snippets that support your topic, if applicable):