Using the free trial app from Inogic to set up a round robin system for my sales team, I ran into the below issue.  

So, I copied over the Prod instance of CRM into the UAT Sandbox and I reinstalled the Lead Assignment & Distribution app, but I am now unable to manually run assignment for leads owned by a generic user (we call the user Team 1). It’s intermittent at least. I do show a number in the Queue Items but when I drill into the Queue, the Queue items list is blank. Is there a delay on these assignments? I checked the Users Security Roles, made sure they had the Lead Assignment User role and added them to the Queues and the Assignment Rules. It’s as if it is stuck. Thanks for any help!