V0.2.6 with flat tables

After upgrading closedxml.report from v0.2.4 to v0.2.6, the reports with flat-tables are not working.
The template has expressions for the flat-table, such as {{item.date}} which was working fine in v0.2.4. But now it does not translate it to the value of the property, it simply shows it as text "{{item.date}}.

is there any change on how to define named ranges and the expression with the new version v0.2.6?

Here is the sample template
[sample.xlsx](https://github.com/ClosedXML/ClosedXML.Report/files/12486915/sample.xlsx)

Here are the results using v0.2.4 and v0.2.6
[samplev0.2.4.xlsx](https://github.com/ClosedXML/ClosedXML.Report/files/12486917/samplev0.2.4.xlsx)
[samplev0.2.6.xlsx](https://github.com/ClosedXML/ClosedXML.Report/files/12486918/samplev0.2.6.xlsx)

Code to generate report

```
using ClosedXML.Report;
using Newtonsoft.Json.Linq;

string outputFile = @".\reports\samplev0.2.6.xlsx";

var data = JArray.FromObject(Enumerable.Range(1, 3).Select(x => new { UserID = $"user{x}", Code = $"00{x}", Message = $"Message for User {x}" }));

var reportTemplate = new XLTemplate(@".\Templates\sample.xlsx");
reportTemplate.AddVariable("ReportRecord", data);
reportTemplate.Generate();
reportTemplate.SaveAs(outputFile);
```

Start by reproducing the regression with the attached sample.xlsx and the XLTemplate code, comparing output from v0.2.4 and v0.2.6. Trace how the ReportRecord flat-table data and {{item.date}} expressions are processed; done means the v0.2.6-generated report resolves the expressions to property values instead of displaying them as text.

Written by the indexing model from the issue text.