Yeah the MIDI channels usually are incrementally different, the channel difference is never very far off. That’s why I think I’m pressing something that I don’t know. I couldn’t find a key command for increment MIDI channel…
Same thing happens with mine with no regularity to it. If I say have a few instances of Alchemy running on different midi channels they will sometimes switch around on me. It happens with any VST’s that I set up using multiple instances.