The bug from change password

1.after login, you can change password by input any letter in current password field that may not right current password with new password.

2.after changed password, old password can still work for a period of time if the system hava cache function, and the new password dosen't work util cached old password expired.

3.when the new password can work, if you don't restart the system, you can only login but cann't access any service.(refer to the attachment).

The suggestion is to disable the change password function, because the Authentication may integrated from external system, such as keystone.