On September 6th, according to Arkham monitoring, a user used MEV robot lightning loan 12 million dollars for "sandwich" attack arbitrage activities, during which a total of 14 transactions were carried out, but when the attack ended and the gas fee was paid, the user only made a profit of $20. Note that a "sandwich" attack occurs when an attacker sandwiches a victim's transaction between two of his own in order to manipulate prices and profit from users.