cid=983212 donated on Oct 17 related to a fundraising event using Stripe, STRIPE CH_1FUYMAIWQMMG1DALBUSRSWYU
Though it's not listed in Civi's Mailing Events tab, the donor then received a enUSC1920_E1 fundraising email on October 22.
I'm not sure how the Stripe contribs reach Civi, but @jkim_wikimedia confirmed that //"They get automatic thank yous via Give Lively (ticketing platform) not from Stripe. It's sent immediately after their transaction."// so it looks like Civi does not send the TY email.
I'm not sure what Civi field the filtering scan for recent donors uses, but if there's a way to add Stripe donors to the filtering scans that would help us retain the donor goodwill generated by these events. Probably won't see a huge number of these complaints, but they are more likely to include MG contacts.