PANews reported on April 3 that a "Circle USDC File" compiled by blockchain detective ZachXBT reveals that since 2022, Circle has been suspected of inaction or slow action in compliance handling of multiple incidents involving theft, hacking, or sanctioned entities, with the total amount involved exceeding $420 million. These include the failure to promptly freeze tens of millions of USDC in the $110 million Mango Markets hack and the $190 million Nomad Bridge hack; the freezing of addresses related to Lazarus Group was approximately 4.5 months later than other stablecoin issuers; and in the Ledger supply chain attack, stolen assets containing USDC remained in addresses for over 3 hours without being frozen.