Hi Bernard,
Thanks for contacting Syncfusion support.
We created a sample in Grid with two unbound columns(columnTemplate, commandColumn) and when we set dataSource through ajaxPost we did not get the filter icons in the unbound columns. So, we unable to reproduce the mentioned issue in our sample.
Find the screenshots:
Before set dataSource through ajaxPost.
After set dataSource:
To find out the root cause, we need the following details.
1. Code example of a Grid.
2. Have you used columnTemplate feature to bind the unbound column in Grid?
3. Essential Studio Version details.
4. If possible, replicate the issue in the attached sample.
Regards,
Prasanna Kumar N.S.V