You are experiencing this problem because the view(net) function does not output a figure, it outputs a Java object. I don't know a perfect work around, but you can try this:
jframe = view(net);
hFig = figure('Menubar','none', 'Position',[100 100 565 166]);
jpanel = get(jframe,'ContentPane');
[~,h] = javacomponent(jpanel);
set(h, 'units','normalized', 'position',[0 0 1 1])
I found this solution here. With this, you can have your network as a figure, and it will appear in the livescript. The only remaining issue is that the undocked figure window doesn't close once it has been plotted in the livescript, which is peculiar.