I have found some problems here with OT SINE in VEpro. I am on an iMac Pro with the latest macOS Monterey and also the latest version of Cubase, VEpro7 and SINE.
The most obvious and easily reproducible is this: if you have several VST instances of SINE loaded into a VEpro server instance, loading the file fresh, the Sine Window is out of sight when you click the first track. That repairs itself when clicking the second track. The SINE plugin is now editable. Now I use the cursor keys to switch between different SINE instances - no problem! Then, I switch to a different tab in my SINE instance (e.g. to the mixer tab). After that, the next time I switch tracks with the cursor keys, VEpro crashes.