I’m still finding the sync is working okay for me.
I have the S6 keyboard and I’ve synced to both Bitwig over USB and to my Digitone over DIN MIDI. I have the S6 set to receive clock and to respond to transport start and stop.
To get the arpeggiator in sync, I need to start the external clock with the Arp button already on. If I switch the Arp button on whilst clock is already running, it syncs the arpeggiator to the moment I press the switch rather than on the beat. Personally, I think it would be much more useful to sync to the beat division provided by the midi clock, regardless of when you press the Arp button.
With my setups I’ve not noticed it drifting over time unless I turn the arpeggiator off and on.
Just wondering if it could be anything to do with the Deluge and MPC sending clock even when the sequencer is stopped?
However, I think the overall clock stability is hugely improved over the previous firmware. I used to get a lot of wobbly delay artefacts before and those are gone now.