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.