.transfer will relay 2300 gas and .call will relay all the gas. If the receive/fallback function from the recipient proxy contract has complex logic, using .transfer will fail, causing integration issues.
https://github.com/code-423n4/2022-12-tigris/blob/main/contracts/Trading.sol#L588
Replace .transfer with .call. Note that the result of .call need to be checked. 
