Cubase or Padshop issue? Cubase is not recording layer automation

I’ve spent the weekend attempting to trouble-shoot an issue with Cubase 7.5 and Padshop (original).

I have recorded automation of the layer mix control in Padshop using the quick controls. It works fine during playback and everything moves as normal but after exporting the mix I noticed that Cubase has not reproduced the automation and I can only hear one of the layers.

Anyone know if there’s a fix for this?