I ran into this issue too.
I had no time to read the workarounds above but what works for me is:
- i open my big template containing all instruments and their embedded expression maps.
- i delete all the tracks
- i save that as a new template called “empty”
- if i start a new project i use my own empty template instead of the default cubase ‘empty’
→ expression maps are loading if you “import tracks from project”
this workaround basically only helps if you’re someone who loads tracks from a big template that they maintain (so you maintain your main template, but also the empty template at the same time otherwise it wouldn’t be updated with any expression maps you might add while maintaing your template), and not in other cases but maybe it will help some