Hi Rick,
unfortunately I don´t have a keystep here to test it with the Zaquencer.
I also don´t have experience with it, how it handles Midi clock etc.
Just some general hints:
- have you tried syncing the keystep with any other midi master?
- can you try to only use one way midi connection to sync it at first, and only then start routing midi back into the Zaquencer?
Basically, I´d try to break down the system into smaller parts for troubleshooting, to check where the weird behaviour originates.
Sorry to not be able to be more specific.
Best,
Christian