Back to VSL after long time, never noticed that all instances assigned to different tracks in Reaper inherited MIDI controller settings!
Here's what happened.
In this project I have Clarinet and String section (6 tracks total).
I assigned CC103 to Velocity XF, CC104 to Vel.XF On/Off and CC105 to R.Samp On/Off in VI (not Pro) in Track 2 (First Violins, SE Chamber Strings Matrix); than I went to other Tracks to patiently do the same instance after instance and… found they were already there!
That's magic (and time saving)!
Keep safe.
Best
VI Special Edition 1-3, Reaper, MuseScore 3, Notion 3 (collecting dust), vst flotsam and jetsam