Replied 8 September 2017, 11:31 pm EST
Apologies for the delayed response.
Thanks for sharing the modified sample.
Here are my observations with the screenshots depicting the behavior at my end :
1) "BeforeRefresh.png" - when the screen is loaded initially
2) "AfterRefresh.png" - after the Refresh button on the screen is clicked (this behavior got reproduced after so many clicks of the Refresh button)
3) "BeforeRefresh_DataGrid.png" - if standard DataGrid is used instead of the C1FlexGrid control, then also the choice Column's Content is not shown.
I would request you to please confirm the behavior at your end once so that I could proceed further.