DataTable have a validate bug

[mseaspring]

First of all, thank you for developing such a great library. Secondly, it appears that I have found a bug. In the case of a DataTable, the last field of the first row cannot be validated and does not display a red frame. Although other cells do display a red frame, there are no prompts. The definition for creating the DataTable is as follows. Thank you.

  new FieldDefinition
    {
        Key = "k6",
        Type = "datatable",
        Prompt = "tab",
        Settings = new Dictionary<string, string> { { "isNeedButton", "true" } },
        Fields = new[]
        {
            new FieldDefinition
            {
                Key = "k61",
                Prompt = "name",
                Type = "string",
                Values = Array.Empty<string>(),
                Fields = Array.Empty<FieldDefinition>(),
                Checks = new CheckDefinition[]
                {
                    new CheckDefinition
                    {
                        Type = "required",
                        Settings = new Dictionary<string, string> { },
                    },
                },
            },
            new FieldDefinition
            {
                Key = "k62",
                Prompt = "age",
                Type = "string",
                Checks = new CheckDefinition[]
                {
                    new CheckDefinition
                    {
                        Type = "required",
                        Settings = new Dictionary<string, string> { },
                    }
                },
            },
        },
    },
};