Issue when using VSL Synchron player?

With VSL Synchron player loaded into an instrument track, I find that when I go into Synchron player to adjust the parameters (change key switches to CCs/change which CCS control what/load and unload patches) when I return to the project window, the copy/paste function stops working. The only way I can find to restore it is to close out the project and re-open, except that this can happen repeatedly.
Any suggestions on how I can get the copy/paste operations to start working again without having to close down?