The Workflow Queue Activity portlet uses information stored in the Workflow log. If the Workflow log has been purged within the time frame you are monitoring, the information displayed may not be accurate.
In OnBase Configuration, ensure that logging is not disabled on the queue which contains the task that you want to monitor. Ensure Log Execution is enabled for each top level Task List that you wish to monitor.
Note:
This portlet requires a Business Activity Monitoring license. In addition, users must be granted appropriate rights to life cycles and queues.