Next Gen Help Desk- List of values not displayed for standard field

Summary:

for Agents in contact section there is a standard field Relationship type code ,the field is displaying however list of values are not displaying.

Can please anyone help if i need to transfer the code or update the code for next gen helpdesk?

Screenshot for refrence:

Application composer:

Manage standard look ups:

Next gen helpdesk Agents view:

Content (please ensure you mask any confidential information):

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

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