Component not showing in Assets and not updating in other files

Hi everyone,
I’m having a strange issue with one component in my design system.

Here’s the full context and timeline of what’s happening:

1. I noticed that a Button component is missing from the Assets panel in other linked files.

2. I checked the design system file and the component exists and looks fine. The library is linked correctly to my working file, and all other components appear as expected. I even tried re-publishing the entire design system, but nothing changed.

3. I tried inserting a new instance of the button manually from the design system file. It shows as linked to the main component, but it still doesn’t appear in the Assets panel.

4. When I modify the main Button component and publish updates, the instances in my file don’t update, while all the other components in the system do.

5. If I right-click the Button component and choose “Publish selected component”, it appears under the “Invalid components” section, with the note “unused properties.”

Everything else in the library works perfectly, this is the only component with this issue.
For context, this design system file is a duplicate of another original DS, so I wonder if something broke during duplication (IDs, variables, etc.).

How can I fix this so the component publishes and syncs correctly again?

Thanks a lot in advance 🙏