Physical Render, MS and Shadows

Was just testing the PR motion blur on some geometry and noticed that when multiple scattering is activated PR does not render the shadows on a density volume. Not a real issue as I very rarely use PR but may need looking into for TFD v 2. I realise PR-MB will not work on the TFD but I wanted to see if I could do a TFD pass that takes the motion blur into consideration ( behind a spinning propeller)