Hi Ducan,
Thank you for contacting Syncfusion support.
We were unable to reproduce the issue at our end and created a sample for your reference.
Kindly share the following details for your query,
1) Essential Studio version details.
2) Provide Grid code example.
3) If possible send a sample or modify the given sample as issue reproducible.
4) Any kind of error thrown in console window? If so, provide screenshot.
5) Whether are you using remote data or local data? If so, provide more details about that.
Note: If you are using remote methods to update/insert/delete a record then please ensure that the postback request fails while updating a record. For this case, the reported issue gets reproduced.
Regards,
Venkatesh Ayothiraman.