Has this been fixed yet?
I'm on Keystep firmware 1.1.0.28 and am having this problem with Midi Clock sent from Reaper, through a Focusrite 18i20 Midi Out, though the problem appears to be on a Clock Start, not a Clock Continue. I would have to consult with Cockos to find out when it sends Start versus Continue, but my intention has always been to have the Keystep, Microbrute and Drumbrute Impact all start simultaneously from Midi Clocks, and they all appear to start with some random offset of incoming clocks, then this offset persists until the device's transport is stopped. I can then Start the device manually and it will be tighter in sync with the other devices only about half the time.
Edit: forgot to mention the method of delivering the Focusrite's Midi Out to the three Arturia devices is through a Kawai MAV-8 midi patchbay. I have also tried sending Midi Clocks only to the Keystep, then having the Drumbrute Impact and Microbrute receive Midi clocks from the Keystep's Midi out, and I get the same problem.