In Studio One 6 Studio One 188.8.131.52029 macOS ARM64 (Built on Dec 9 2022) I created a new preset in VT1 Tube Modeling Channel Strip and activated it on my Main, it sounds terrific, too .
I then save and close the song.
Later when I open the same song the volume has dropped @ 15-20db. If I inactivate the preset I created my volume is bock (minus of course any that was added in the plug-in I created).
This occurs with all presets that I have tried to create in VT1 Tube Modeling Channel Strip. I like this plugin.....
macOS Monterey 12.6.2
Mac Studio (2022) M1 Max