Diffeomorphic Not loading .Json Favorites to multiple objects?
I SWEAR this used to work but I can't for the life of me get it to work now. Genesis 8 character with facial expressions loaded as custom morphs, NGV8 loaded with morphs. Save .blend file, then exported JSON list of favorites. Checked JSON and they're listed there. Import into blender with Easy Import, Favorites .json file selected in panel. Load different model with same geoshell and Gen8 body... ONLY the Geoshell morphs show up. All the facial morphs are lost/not imported. They still show up in the source blend file for both objects respectively. Again, I swear this used to work so you could load up all your morphs into the favorites, then Diffeo would import them to base mesh and any matching geoshells. (Blender 5.1.2 with Diffeo 5.1)

Comments
May be you need to check "ignore url" otherwise G8 and G81 are treated as different meshes. Let us know if this works.
update. I found some quirks with favorites, though not what you're describing. Now reported to Thomas.
https://github.com/Diffeomorphic/import_daz/issues/64