We use Revit Parameters to store our P6 schedule Task Code. With the newest release of Synchro user fields are not being added to NEW model elements when synchronizing a newer version of a model file (.dwfx), with a model file that was previously loaded into Synchro.
The only way I have found to correct this is to completely delete that model file and all of the links and start over. This is a problem as model elements frequently move from one schedule activity to the other. Without the user fields correctly updating we have no way to keep the 4D model in sync with our project schedule.
Screenshots and model synchronization settings attached.