Vortex Sound Research

Hey People, I bought a Moog Werkstatt a month ago. Now I want to use it with my Arturia Keystep. For this Process i calculated the Werkstatt. I have the issue that its not stable in Tune. As soon as i close it after calibration its detuned about a semitone. Did anyone had this Problem ? Is there a proper Solution for it? I think that the calibration knob is way to sensible. Thx in advance