When a user opens a task that is assigned to a group the user is a member of, they see the option to accept the task. However, once they navigate away from the task by hitting "go back" or navigating to another tempo page, they will notice that the task indicated they have accepted when they revisit the task again.
This issue has been resolved via AN-85800 in the following Appian hotfixes/versions:
Apply the latest hotfix to your Appian installation or upgrade to the latest version of Appian.
To avoid any issues related to this behavior, users may actively reassign the task to specific users or return the task to the group if they are not prepared to handle the task immediately or if they are not confident they will address the task at all.
This article applies to Appian 17.1 and 17.2.
Last Reviewed: August 2017