I’d noodled a bit with this since the A4 - it’s a bit fiddly to ‘lose’ a hand of course and to use external control … certainly fun performing potential; it’s certainly not a bug as you are basically manually reprogramming the trig page info with the external input, so it changes your ‘host’ pattern potentially … i hadn’t dug into it by sequencing, just manual playing via an auto channel keyboard
there’s a bit of recent chat here on this concept
much more handy on a device with its own ‘proper’ keyboard (AK DNK) imho but sequencing externally is a neat evolution on that