Grid / Filter Multi Checkboxes - inconsistent behavior

Hi,

We're seeing an inconsistent behavior with the grid filter multi checkboxes that I've been able to reproduce on the demo page (http://demos.telerik.com/kendo-ui/grid/filter-multi-checkboxes).

Here's the scenario using the Client Operations grid.

1. Click the filter for the ProductName column and select the items Chai and Chang, then click the filter button. The filter is applied and the grid updates.

2. Click the filter again and uncheck the Chang item, then click the filter button. The filter is applied and the grid updates.

3. Click the filter again and uncheck the Chai item, then click the filter button. Nothing happens.

This is inconsistent to the user because sometimes you uncheck the checkboxes and the filter updates but sometimes it doesn't.

It looks like if you clear the last checked item on the list the filter will not update, you have to click the 'Clear' button.

Thanks!

Chris