I think I have found a issue with the Scraper in JavLuv.
So do a update on a actress in movie view (Right click Update), one with no pic or real info other than maybe a English name. If you get no results do this. Make sure and I stress that you have either backed up the Nfo for the movie or don't care about its metadata, you may have added info.
Anyway. Go back to the movie view and its best if you type its name directly into the search so only the one movie shows. Now Regenerate the Metadata for said movie and then when done, go into the movie view and on say 6 out of 10 times it will have filled in new Actress data and or All missing actress data. It seems to be a issue with the the scraper to update the actress when you right click her but when regen whole movie data base, it works way better.
Your mileage will vary but it works best on actresses that have made several movies but have little to no data. I know you said you changed scrapers not long back?
Note: I did a full regeneration of data around V1.1.25 or so. The update all actresses or movie seem to suffer the same fate as right click update.
I obviously cannot regen all data now as it would be bad

So I am doing a per required at the mo. Thought you may know a easy missed fix.
Thoughts
@TmpGuy ?