A new controversy is making the rounds in crypto after blockchain investigator ZachXBT said Circle may have blacklisted a contract tied to Zama’s confidential USDC, or cUSDC, on Ethereum, freezing around $12.6 million in user funds. According to ZachXBT, the blacklist action happened roughly seven hours before he shared the update, and it appears to have locked the contract address used for Zama’s privacy-focused stablecoin setup. If accurate, that would mean users suddenly lost access to a very large amount of funds without much warning, which is exactly the kind of thing that tends to set off alarms in the crypto world.