Hi,
maybe this is similar to the problem i noticed in Matrix-12V. With the VST2 plugin presets are saved with the Cubase project but with the VST3 not.
I will try to check that with the VSt2 and VST3 of Solina ASAP.
If you have installed the VST2 and VST3 and want to use the VST2 plugin in Cubase you would have to delete the VST3 plugin as this is used by default when both are installed.
UPDATE:
I just checked this. Like with Matrix-12V the problem seems to be related to the VST3 plugin while with the VST2 plugin patches are re-loaded properly from the Cubase project.
Ingo