I searched the Linux forum and saw several users also complaining on Movies posters not being shown. l tried disabling IPv6 as suggested in Plex Not Grabbing Movie Posters Metadata but no luck either in getting the posters being displayed (TV Shows posters work as a charm BTW).
I also explored the cache and the posters and thumbnails are in there, so it’s seems to be a local issue just on displaying them somehow (both the web player and a Samsung SmartTV client fails similarly).
Did the internal troubleshooting discover any clue on the root cause?
TIA