I have a PO-12 and PO-28 that I sync with an Arturia Keystep. My PO-12 syncs perfectly every time and stays on beat regardless of where it is in the chain. My PO-28 drifts after about the 4th loop. I took some time this morning to try and isolate the problem. I connected it in various sync modes, and it seems that the PO-28 gets off by half of a step after being in sync for four steps regardless of whether the clock signal is coming from my volca keys, arturia keystep, or the PO-12.
Is there some secret setting that I have turned on that's causing this to happen? I've tried taking out the batteries and I've also tried different kinds of batteries. Or is my PO-28 just faulty?