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

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.

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?

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.