Attestation - Deny do not deactivate employee

Hi, in version 8.2.1, when I deny an attestation of an Employee, I get the employee with approval state "Denied", but it remains active, instead, if I set manually the certification status on denied, e.g. usign the task in manager, then the employee is deactivated.
What should change the "isinactive" flag to true? Why it doesn't happen?
Thanks,

Roberto