According to the news on May 20, the latest update of Aave V2 has made it impossible to withdraw, borrow and repay about 110 million US dollars of WETH, USDT, WBTC, and WMATIC on Aave V2 on Polygon. At present, Aave has submitted a patch to fix this problem, which will be deployed after voting. The problem occurs because Aave V2's Polygon implementation uses a slightly different list of function definitions for its interest rate strategy contract, making the update buggy.