Hi,
unfortunately after upgrading to the latest Version my application has serveral errors. The reason seems to be a bug in server-filtering.
Try
https://demos.telerik.com/aspnet-mvc/grid/serverbinding
Filter column product ID = 1 => It works
Then filter column product ID = 1 OR product ID = 2 => Error
The internal error is a NullReferenceException (see attach file).
Not so good...
Bye, Michael