un-requested feature
A computer process or action that occurs when the user did not want, or expect it to happen. When testing or working on computer software, the expected action resulted in a different outcome. Although you are still able to work, the un-requested feature is annoying and often requires additional user intervention or stoppage.
After the upgrade, the computer was suppose to do something, but did something else. This was an un-requested feature. When the user was logging into the database, the silent login was working. The user did not have to enter his/her password a second time. The users were tired of continually entering in their password when the computer password login was sufficient for security. But when the user attempts to login to another database, the silent login prevents the user from logging in. This was an un-requested feature.