Hello dear Dorico team and fellow users,
I would like to share with you a solution that I came to in order to avoid some drop-outs and crackles that appeared from time to time with Dorico + VE Pro + VI Pro Dimension Strings.
Probably may be helpful to someone else with the same, or similar issue. 
Everything is mainly related to the Voice Settings in VI Pro Player. Here is how it looked by default when I had the problem (the enclosed in Red):
And here are the changes that solved the issue (enclosed in Green):
The Default Preload (samples) is defined by the VI Pro Directory Manager:
With these setting I can play fairly large project / template without any drop-outs, or crackles
even at Audio Interface Buffer Size of 128 samples.
With the kind assistance of @Ulf (to whom Iām very thankful), I started to think a bit more deeper about the VI Pro settings and play around with them until I get the desired result.
Best wishes,
Thurisaz