Hi!
I think this is a bug…
The history on the mixer does not follow the changes that one made for example on the volume of a track in a project. This happens on Plug Ins as well. There is a video on YouTube on bugs on Cubase 9. This video includes demonstration of the same issue as above. This issue was still not resolved through the recent patch update.
Please assist because the History on the mixer is the one feature that sets Cubase apart.
Regards