Some tokens, such as Tether (USDT) return false rather than reverting if the approval fails. Use OpenZeppelins safeApprove(), which reverts if theres a failure, instead
There is 1 instance of this issue:
https://github.com/code-423n4/2022-05-sturdy/blob/78f51a7a74ebe8adfd055bdbaedfddc05632566f/smart-contracts/YieldManager.sol#L221
