Missing Posters and Descriptions on TV Series

Good morning.
Recently I migrated contents from an older version of Kodi to the new 18 RC. The platform is a QNAP NAS (under the enviroment myHD Ubuntu 18.04)
I made an export of my old library, then I imported it to the new KODI version, but this import was stopped before its end by mistake. After some minutes I launched the library import again over the previous one and it completed succesfully.
Result: Now I am not seeing Posters and Descriptions anymore on several TV shows in the main list (it says "no information available", BUT if I enter inside the show page, I see everything.
I tried to clean the library, to remove the source in the library and then to add it again, but it is the same like before.
For example: let's consider one of the TV shows affected by the problem: "Almost Human".
Screenshot of the List: No description
Screenshot of internal page of the show: Full description and images
Paste of my last Debug Log: https://paste.kodi.tv/yukeninete.kodi
During this debug log, I made a force rescan of the serie "Almos Human" to reload its data, so I kept the same show as example, but it affects many more on my library.
Thanks in advance for any help.