Thanks for the tip. Further investigation has found it to be a Nord Pad manufacturing issue, so I have sent it back to Germany under warranty (thank god!) to get repaired. Still have to cover postal costs one way, so it’s not cheap, but I’m glad the shop I bought it from is working with me on it considering I now live on the other side of the world!
I ended up getting a 3P because I didn’t want to wait for international warranty stuff to play out - the Nord Drum is central to my whole setup - so when the ND2 Pad comes back I’ll essentially have a 12 pad, 12 voice über-Nord Drum monstrosity, all running through two H9s and an Analog Heat. Slightly excessive, but that’s oksy with me!
In the meantime, using the 3P pad to trigger the 3P + the ND2 module at the same time = awesome layering possibilities! Love these machines so much