Things seem fairly stable at the minute. I've been fiddling with settings. I turned off the Auto midi channel on the digitakt (which was using 15, although I assume NDLR wouldn't pass its control data thru?) and I turned off transport-send from the digitakt too as I'm temporarily clocking Pam from NDLR's CV out. This isn't ideal longterm as I need the start/stop message for Pam but I can work around it temporarily until I work out where this gremlin is. I also don't see why this would help as digitakt sending transport to NDLR should do nothing as far as I can tell, and even if it's passing it thru nothing receiving it would trip up because of it.
Maybe it's the direction the wind is blowing.
Maybe it's the direction the wind is blowing.