It looks like an interestingly complex issue… I reproduced the issue for you and got different results based on where the file lives.
• I made a small video capture to get a .mp4 file and named it: My video S01E01 - Premier episode de ma serie
• I added metadata in iFlicks in all relevant fields (including poster, show description, actors, screenwriter etc.).
• I first placed the file at the root of the folder. When I do that, it’s not too bad: it shows the poster, title, director, etc, but some metadata is still missing (e.g. the actors).
• I then moved it to a subfolder named “My Video”. Then the poster disappeared and was replaced with a preview of the video itself.
Finally, I moved it to a subfolder named “Crime à…” and the series itself got renamed to “Crime à…" as well, even though that name is nowhere in the file name or in the metadata.
I attached the video itself and the debug logs.
My video S01E01 - Premier episode de ma serie.m4v.zip (940.7 KB)
Plex Media Server Logs_2022-03-15_16-27-41.zip (935.7 KB)
