Hi,
Yes, I tried to update it before. I thought it would fix the problem.
As you can see, I'm using 18.2.0.57. I was using version 56 but I updated it today.
The sample that you sent works fine.
Could be something related to the way I set datasource? I don't use dataSource="@ViewBag.DataSource". I use jquery to set datasourse with JSON.
Even showGroupingBar="true" is working well in my software, but in the sample it works well.
Thanks again.