Cannot grab Tonight Show w/Jimmy Fallon

Sonarr version (exact version): 3.0.4.1058
Mono version (if Sonarr is not running on Windows): 5.20.1.34
OS: Linux (Bytesized)
Debug logs:
Description of issue:
Have got Sonarr set up ok, using IPT as an indexer via Jackett.
I’ve got a a couple of shows added, and I can search them, even back several seasons old. But I cannot for the life of me get The Tonight Show with Jimmy Fallon to search. Even after deleting a couple of times and re-adding it. It also didn’t grab the first episode when it was added to IPT, which is where it all came to light. It shows up if I search in Jackett, and if I send a show to the black hole folder from Jackett THEN Sonarr will show the series in search for a while, but then stops. Be keen to hear if anyone has an idea on how to rectify, as this was pretty much the main driver for setting up Sonar in the first place.