Integration with views field view

Dear all,

I've integrated a "views field view" within a view (two different content types), and now defined facets are *at least* odd:

- some of them are empty but visible (related content is referred only to one content);
- other facets are incomplete (only some values from a content type)

All the fields are correctly indexed, actually facets are fully defined when content from each content type is viewed separately.

Someone already faced to this issue?

Thank you so much!