The changed password is not synchronized across the cluster
If the STIG option is enabled or custom password rules are set for expiry, the user password expires as per the set password policy. After the password expires, the user is prompted to change the password if the user logs on to the system via SSH. If the user changes the password at the prompt, the password is changed only locally and is not synchronized across the cluster.
(IA-35890)
Workaround:
After the password expires, when prompted, do not change the password at the OS prompt. Instead, log on to the GUI with your credentials and change the password from the GUI.