Service Item in Kanban Set Up 2012

Hi gurus,
If anyone has a counter information to this set up issue, I’d be happy to hear from you.
In classic production management by production orders, service items included in a BOM have the stocked product box of the inventory model group checked.
In a kanban managed production environment, the opposite applies and a service item with this box checked cannot be included in the service terms of an activity within a production flow.
I haven’t seen any information regarding a correction for this in R2 of 2012 but I’m open to comments.
Regards,
Monty