Posters not loaded from cache in movie info dialog

Hi!

Since the update to Kodi 17 on my Raspberry Pi 2 it seems posters are not loaded from the thumbnail cache anymore if i show the details for a single movie. In the list view with all movies the posters are loaded correctly when i scroll down. Fanarts are shown both in the list view and in the movie details dialog. That means all posters are missing in details view until my external harddrive with the movies is powered on.

Here are the corresponding lines in the debug log:

Code:
10:46:44.066 T:1958478768   DEBUG: ------ Window Init (DialogVideoInfo.xml) ------
10:46:44.081 T:1958478768   ERROR: COMXImageFile::ReadFile /media/MOVIES_EXT/### MOVIES ###/Diverse/Asterix im Land der Götter (2014)/Asterix im Land der Götter (2014)-poster.jpg not found
10:46:44.081 T:1958478768  NOTICE: LoadJpeg: unable to load /media/MOVIES_EXT/### MOVIES ###/Diverse/Asterix im Land der Götter (2014)/Asterix im Land der Götter (2014)-poster.jpg
10:46:44.135 T:1726034928  NOTICE: service.watchedlist: WatchedList Database Service starting...
10:46:44.139 T:1726034928   DEBUG: service.watchedlist: data_dir() = /home/osmc/.kodi/userdata/addon_data/service.watchedlist/

It seems that Kodi ignores the cachedurl in Textures13.db. This url is set in the database and the files exist in the Thumbnails-Folder too.

Is that a known bug of Kodi 17 or can I change that behaviour somewhere in Kodi? In Kodi 16 I never had such a problem…