To more fully understand what is going on, we need to review the client Tracker logs.
To enable logging that will help illustrate what is going on, read http://pharos.custhelp.com/app/answers/detail/a_id/1911. With logging on, repeat the job with the Canon imageRUNNER driver and then collect the logs. At this point, it would be better to engage Pharos Support (email us at email@example.com) with the logs and problem definition. We're always happy to post back here in Community to ensure that any others who have experienced your challenge can learn as well.