There is a problem with the filters in the Kendo UI Spreadsheet.
You can replicate the issue using the sample : http://demos.telerik.com/kendo-ui/spreadsheet/sorting-filtering
and adding the "frozenRows: 3" that keeps the report header and the columns headers frozen so that the data can scroll down.
Now, if you click on the filter arrow on any filtered column it works, but if you scroll down the data and try to click the filter arrow the selection dialog does not appear anymore...scrolling up on top it works again.
Is there a way to fix ?