Incorrect "created_by" values in table PER_USER_ROLES

We have identified an issue in the PER_USER_ROLES table where the value in the CREATED_BY column does not reflect the actual user who assigned the role. Most of the times it correct but in several cases, the column shows user FUSION_APPS_HCM_ESS_APPID or an HR user that does not have the access to assign roles.

Is this the correct table to use for tracking who assigned roles, or is there another table/view we should be checking instead?

Has anyone seen the same thing?

Kind Regards,
Ida