Hey there!
I came upon a strange problem when using Komplete Kontrol inside VCV Host: At first everything is fine, but when I close the patch and open it up again the tuning of the instrument is suddenly pitched up by 147 cents.
I’m running everything at 48kHz, so I suspect it might have something to do with sample rate conversions. Edit: I just checked and it doesn’t happen when running at 44.1kHz.
So far it happened to me with a couple of VST plugins inside Komplete Kontrol, but not when loading them directly without KK.