to @Halvliter
I managed to solve it by mapping the media folders in the docker container with the name used in Sonarr/Radarr, and not using any path mapping into Bazarr itself.
Example:
I have 3 media folders: "COURSES" "DOCUMENTARIES" "MUSIC_CONCERTS" and they are mapped in the Radarr Container as this "Courses" "Docu" and "Music". All you have to do is to map those folders in the Bazarr container in the same fashion as Radarr.
Now, as the container specs states, I'm not sure that the /movies and /tv folders are still required, but I kept them in there and it's working flawlessly. Noticong a lower CPU usage but not sure it's related.
Hope it helps.