we use Kendo UI grid for Angular 2 and we found an issue with default kendo-string-filter. When text is entered into filtering cell the bound filter object is correctly updated,and reset filter button appears, thats fine.
When the text in filter is deleted one would expect filter reset button to disappear and given filter criteria (FilterDescriptor for that column) to be removed from filter object. That is not what happens however. When text is deleted (by backspace for example) he reset button stays visible and bound filter object still contains the FilterDescriptor for that column, just with value being '' (empty string).