QAN describes itself as a blockchain that helps "resist quantum attacks", though apparently not the types of bridge attacks that have become fairly common in the past year or so.
"Quantum-resistant" blockchain QAN suffers bridge attack
The $QANX token for the QAN project suddenly plummeted in value as an attacker stole more than 4 million QANX from the project. The attacker subsequently swapped the tokens for around 370 ETH ($707,000). In a video posted to Twitter, the project CEO stated that it was "definitely a bridge issue", and that they'd shut down the project's bridge. They also said they had contacted exchanges to freeze the wallets that had been involved in the "issue".