Oddly, if I strip the instrument away then I don't have options to add any new parameters to the automation window. And the additional lanes I created disappeared when I removed the instrument, except expression. Fortunately, it does exhibit the symptom.As you've seen we could not reproduce your issue. So if you want the support (and the developers) to be able to reproduce it you should provide a song file.
How to strip it down:
1) Keep only the two involved instrument tracks
2) Remove unused instruments (there's a new command for that in the instrument rack). In the best case you remove ALL instruments.
3) If it does not work without the instruments try to replicate it with a basic Presence XT patch
That's enough to give them a chance to reproduce the issue.