TWebClientDataSet Help?

Hi,
i am using TWebClientDataSet for getting data from db. As i getting list of rows i saw my first row's "value_integer" field's value is null but last row's "value_integer" field's value is 1 . Because of that i am getting value using " FieldByName('Value_Integer') .AsString" but i am gettin empty string for last row.

TMS Web Core Version: v2.1.0.0 Beta
Delphi: Delphi 11.0 Version 28.0.42600.6491

Pictures:
OutPut:
Output

Developer Console:
fieldValue

It is unclear why you get this.
Do you have more details, i.e. the JSON that you use to fill the dataset so we can try to reproduce this here?