I have the same problem. 7.1.35 on a Mac.
Doing starting points for 500+ tracks and remixing 12 hours of a really big movie project within strong deadline - is not funny at all.
Have no ideas what to do.
But are initial values on all parameters controlled by VCA is the solution?
P.S. Great but practically unusable features like Version Tracks (playlists), Virgin territories and now VCA - so sad to imagine what a great program Nuendo could be.