Delay can not be set to default value once set to a specific per function value

Summary

The desired feature as per the docs of setting the timelock to 0 to signal the use of the default timelock is not possible once set to per function:

Contract will allow setting timelock to 0 for specific function selector which means that contract will fallback to using default timelock config in future for that function

Vulnerability Detail

The setter for the function specific timelock is:

function setFunctionTimelockParameters(
    address target_,
    bytes4  functionSelector_,
    uint32  delay_,
    uint32  executionWindow_
)
    external override onlySelf
{
    require(delay_           >= MIN_DELAY,            "GT:SFTP:INVALID_DELAY");
    require(executionWindow_ >= MIN_EXECUTION_WINDOW, "GT:SFTP:INVALID_EXEC_WINDOW");

    functionTimelockParameters[target_][functionSelector_] = TimelockParameters({ delay: delay_, executionWindow: executionWindow_ });

    emit FunctionTimelockSet(target_, functionSelector_, delay_, executionWindow_);
}

As can be seen, delay has always to be >= MIN_DELAY, making it impossible to set it to 0 again and allow the usage of the default timelock.

Impact

Timelock of a function can't be set back to the default value.

Code Snippet

https://github.com/sherlock-audit/2025-09-maple-sept-8th/pull/1/files#diff-8976e5067f2102ea34580e0de5ec6762a73d214088306194672c326512646a77R118

Tool Used

Manual Review

Recommendation

Allow setting the delay to 0.