After 26A Update user cant reassign task field whom reassign tasks to show no employees

Summary:

Hello Team

as titled after last quarter update line manager cant re-assing task, button shown but when click no employees shown at all

its enabled for line manager from setup side and was working fine before update

Any input how to resolve this

Thanks

Content (please ensure you mask any confidential information):

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

26A

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