Anime from Nyaa matching some, but not all episodes. "Release Rejected - Unknown Series"

[Hand]

Sonarr version (exact version): 3.0.9.1549/ 3.0.9.1549-ls155 by [linuxserver.io (https://linuxserver.io/)
Mono version (if Sonarr is not running on Windows): 6.12.0.182
OS: Linux 5.15.46-Unraid 6.10.3
Debug logs: https://gist.github.com/PlotTwisted/b0e2706de7e42f5b377e83cb15553cbf
Description of issue:
I was trying to download the anime A Couple of Cuckoos (Kakkou no Iinazuke in Japanese) from Nyaa, and I set up a release profile to match with [Anime Chap] releases for that specific anime. The first 9 episodes matched and downloaded without issue.

The issue is, with episodes 10 - 20, sonarr refuses to match, even though the release group did not change their titling at all from past episodes.

Episodes 1-20 have the same title format on Nyaa and the same filename format.

[bakerboy448]

Seems it’s pure luck the single digit episode numbers worked

2022-09-11 14:20:03.0|Debug|DownloadDecisionMaker|Processing release '[Anime Chap] Kakkou no Iinazuke S01E12 [WEB 1080p] Improved Subs {OP & ED Lyrics} - Episode 12 (A Couple of Cuckoos)' from 'Nyaa'
2022-09-11 14:20:03.0|Debug|Parser|Parsing string '[Anime Chap] Kakkou no Iinazuke S01E12 [WEB 1080p] Improved Subs {OP & ED Lyrics} - Episode 12 (A Couple of Cuckoos)'
2022-09-11 14:20:03.0|Debug|Parser|Episode Parsed. Kakkou no Iinazuke S01E12 [WEB ] Improved Subs {OP & ED Lyrics} - - 012 
2022-09-11 14:20:03.0|Debug|Parser|Language parsed: English
2022-09-11 14:20:03.0|Debug|QualityParser|Trying to parse quality for [Anime Chap] Kakkou no Iinazuke S01E12 [WEB 1080p] Improved Subs {OP & ED Lyrics} - Episode 12 (A Couple of Cuckoos)
2022-09-11 14:20:03.0|Debug|Parser|Quality parsed: HDTV-1080p v1
2022-09-11 14:20:03.0|Debug|Parser|Release Group parsed: Anime Chap
2022-09-11 14:20:03.0|Debug|ParsingService|No matching series Kakkou no Iinazuke S01E12 [WEB ] Improved Subs {OP & ED Lyrics} -

Those releases you wantare also standard and not anime. Is the series set to the series type of standard?

[Hand]

Negative, the series is set to Anime, because otherwise, searching by episode would not search from nyaa.

Also, in the same logs, there’s the entry for when episode 9 (one of the accepted episodes) was matched to compare to the failed ones.