I have no experience with Jellyseer, but, in Sonarr, the Specials are unmonitored by default. You could try Monitoring them from Sonarr and theyll eventually show up in your library if you’re lucky (specials are usually harder to find than regular episodes).

Doesn’t solve your Jellyseer problem, though. Might be worth logging a ticket with the developers I suppose.

On an unrelated note, love your content choice! Who is your favourite DI? Mine’s Mooney, although I’m quite fond of Neville as well.

Are specials requestable in jellyseerr? They aren’t in overseerr, so they have to be manually requested in sonarr. Also, sonarr uses tvdb and as I understand it, it’s unlikely to ever support tmdb, so if jellyseerr uses tmdb like overseerr does, then that could be another source of confusion if there are differences.

For now if you use sonarr you just have to accept tvdb and set other things to use tvdb where possible (Plex and jellyfin), and accept mismatches where it can’t be changed (like overseerr / possibly jellyseerr too since it’s a fork)