Maybe you’ve got to change the modwheel midi cc to match the one on the digitone. I think you can do that with the Arturia midi control center.
same here, stops working. after look in midi control center there was a CC 10 not CC 1 -> works again
Sitting here waiting for my Keystep to arrive from FedEx!
$560 for Digitone new
$120 for Keystep new