Excellent analysis by nostr:npub1kyxqqqq8n2pu7f5pthr48zqcmr2k52vrud6wxzjpg0jsqcyhs3tshfc6vv. It was subsequently confirmed by Wan Chun of F2Pool, but they've decided to stop filtering transactions for now.

https://b10c.me/observations/08-missing-sanctioned-transactions/