This was visible on the core using OSD scripting, not using Provisioning. You can still make it visible by starting the Interactive Services Detection Service on the Core. You will get a pop-up notifying you of the Custom Job screen running in the background.
In LD9.0 you need to login within 10 minutes of machine start, otherwise the provisioning agent will run as local system, not interactive. Can that be the case? Otherwise check the logs in c:\ldprovision