Hello @JimmyM
Thank you for your support.
For the issues that are reproducible every time (clock problems) I really tried to understand what is happening by doing several tests, modifying the settings of the Super 6, the KeyStep and the MPC One. But I did not resolve them. Other forum members have tried and had the same problem with clock and KeyStep 37 (see ARP Not Responsive in ABLETON After I Stop Track - #18 by waxdoctor)