It does not display one series whose name is 4 digits "1670"

[ikswezclam]

It does not display/list only one series whose name consists of 4 digits "1670"

SERIALE\1670 (2023)\Season 01\1670 S01E01.mkv

[theguymadmax]

Just name it "1607" without the year. Jellyfin has issues with titles that are only digits.

SERIALE\1670\Season 01\1670 S01E01.mkv

[jimmyjammy]

or use the hamburger menu & identify it

[ikswezclam]

Just name it "1607" without the year. Jellyfin has issues with titles that are only digits.

SERIALE\1670\Season 01\1670 S01E01.mkv

Thanks, your trick solved this problem.