Customer add following rule to find switch user.
editres SURROGATE ('USER._default') audit(SUCCESS FAILURE) defaccess(READ) owner('nobody')
When non-root user switch to another user, it appears both surrogate log as non-root user to another user and non-root to root user.
Prod: CA Privilege Access Manager Server Control r14.0 for Endpoint.
It may occur on Privileged Identity Manager r12.8 SP1 or so.
Customer found the problem is occurred when SELinux is 'permissive'.
So, it works as expected after disable SELinux.