In the last month we just added a new building with CP IPC controllers. At first everything ran fine, but just as the commissioning agent started work in the building we started losing VAV comms and then heat pump comms. The IPC controllers are still communicating, but it seems the sub devices are starting to disappear a few at a time. Is this an issue with the commissioning agent plugging in on the mstp bus or is this a problem with EBI?