“Local information” scraping in gotham doesnt take fanart – how to fix?

Hi
I have an extensive library of movies. All movie entries have NGO files and poster and fanart entries, which were created by an export lib of another kodi install.
When I update my lib on another box using local info (instead of movie db) it seems to ignore the exported fanart data.
Is this a know bug i gotham (and maybe fixed in later releases)?
How can i make sure that update w local info only also imports the fantart?

Sent from my iPhone (typie typie)