When the Grid has groupable and navigatable configured but only one of them is enabled a title ‘Press Ctrl + Space to group’ is displayed. However, the grouping will not be performed in this configurations.
Title ‘Press Ctrl + Space to group’ is displayed
A relevant title should be displayed or no title, as Ctrl + Space will not apply grouping
Workaround - https://dojo.telerik.com/OSsMArKk/2
dataBound: function(){ $('.k-table-thead th').attr('title', 'some text') },