The reporter claims to have "evidence that shows that in several cases German law enforcement authorities were able to locate the Tor entry node of onion services and thus successfully deanonymise Tor users. V2 and V3 onion addresses were affected at least between Q3/2019 and Q2/2021."
this timeframe sounds familiar. https://nusenu.medium.com/is-kax17-performing-de-anonymization-attacks-again... maybe, maybe not.
Looking forward to their publication.
kind regards, nusenu