I think this is the same issue that I have, the Panorama doesn’t follow the tracks you’ve selected using the mouse or cursor key, instead you have to select the track manually and then use the ‘Track +’ and then the ‘Track -’ buttons on the Panorama for it to pick it up.
You can tell which bank of tracks the Panorama is following by the white blocks to the left of the track info in Cubase. I use Logic too and it works fine - you select a track and the bank follows accordingly, unfortunately not the case in Cubase. Oddly, the Eq’s etc do follow the selected tracks.
So I’ve spent many a time adjusting the fader on the P6 to find I’m not controlling anything!
I hope this is helpful.