hey Martin
in my case I am not sure.
I use 3 VePro clients which are in hybernation when not used.
After reactivation of the slaves I usually load the project in Cubase.
It is strange though that not all of the slaves instances on one client are affected which would make sense if there is a general connection problem.
I am still looking for a way to reproduce this but it’s not happening everytime :-/