Actors Pictures not exported

I am using a Windows 10 PC (Kodi 20.2 or 21.1 ) to create the data for the movie library. For this I use a local folder (New Films) in which I place the movie file within a folder with the same name e.g. Movie Name (movie name.mkv). After scraping I shift the folder “Movie Name” with its content to the NAS for playback.
I scrape the movie by pointing to “New Films” and select “Scan for new content”. After that I choose “Export Library” and confirm “separately” and all the rest. This creates within the folder “Movie Name” the .nfo file, the -poster.jpeg and a folder “actors” in which the actor pictures should be stored.  With older Verrsions this had worked. With the present version the folder “actors” is created but remains empty. In order to get the pictures moved , it seems I have to open the movie data within Kodi using “information” and then choose “refresh” and then export again. Then the actor pictures appear in the folder”actors” within the “Movie Name” folder.