Steps to Reproduce:
1) Open https://codepen.io/anon/pen/gqYmqX, in which the grid is initialized without any data.
2) Click the "Set Model" button to attach data to the grid including a column with groupIndex: 0.
Results You Received: The column (Company Name) with groupIndex: 0 is not grouped.
Results You Expected:
The column (Company Name) with groupIndex: 0 should be grouped.
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.
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