ReflectionFunction FormulaType Blank issue

Hi,

I'm having issue with running my formula on a custom function, it seems it always wants an object and when the object is null / blank it just throws error: {Error: Runtime type mismatch}, is there a way to fix this without adding a check in the formula?

function:
`public class HasTermGuidFunction : ReflectionFunction
{
public HasTermGuidFunction()
: base("HasTermGuid", FormulaType.Boolean, [RecordType.Empty(), FormulaType.String]) { }

public static BooleanValue Execute(FormulaValue t, StringValue s)
{
    if (t is RecordValue recordValue)
    {
        // Parse the input string to handle comma-separated values
        var searchTerms = s.Value.Split([',', ';', ' '], StringSplitOptions.RemoveEmptyEntries)
            .Select(g => g.Trim())
            .ToList();

        // If no specific terms provided, use "*" as wildcard
        if (searchTerms.Count == 0)
        {
            searchTerms.Add("*");
        }

        // Use "all" as the default matching mode
        return FormulaValue.New(HasTermGuidImplementation.HasTermMatchRecursive(recordValue, searchTerms, "all"));
    }

    return FormulaValue.New(false);
}

}`

Formula:
"If(Not(HasTermGuid(NewPage.Properties.BusinessArea,defaultDepartment)),defaultDepartment)",

If NewPage.Properties.BusinessArea is an object it works fine
If NewPage.Properties.BusinessArea is Blank / Blank() ({N}) it throws {Error: Runtime type mismatch}

Start by tracing ReflectionFunction and the FormulaType.RecordType.Empty() argument handling for the shown HasTermGuid formula. Reproduce the Runtime type mismatch with a blank NewPage.Properties.BusinessArea, then compare it with the object case. Done means the blank input behavior is resolved without requiring a formula-side check, with coverage for both cases.