After saving and reopening the Cubase project, die descriptions for the channels are lost.
I suspect these are saved on the remote (performer) computer - (or it might be a bug !) - is the performer closing down their software correctly ?
I suspect this information will be stored within the Cubase project like the used plugins on performers side.
The performer in my case closed the window after I save and close Cubase.
The information is saved on the Performer side. They should match those when properly closed for the according Cubase/Nuendo project, each of which has their own settings.