When trying to filter for a single user ("inherited" in this example) in the Administrative Activities report, that user cannot be selected.
When the report is generated without any filter, the user is in the report.
Privileged Access Manager, all versions as of 4.1.7
The user "inherited" had their Credential Manager group inherited. The underlying SQL query generates the list of Credential Manager users based on the groups directly assigned to the users. Any user which has their CM group inherited will not be listed.
This behavior will be fixed as DE599066 in a future PAM release, version TBD. As a workaround, download the full Administrative Activities report as a CSV file and filter for the user(s).