Have you actually ever see ND lurk as scum though? Because I can only remember ND being active and convincingly town as scum. Which I feel you should also be aware of. This ND just reminds me a lot of our small game where he was the easiest mislynch D1 because he often doesnt care as town.
Maybe he's just lifting on that, but he would be noticing as scum that it isnt working out the way he intends to.
Im pretty much leaning on ND simply being town here.