I am seeing this bug for more than year ago, it would be really nice if you fix this issue, because it works really very well in Ignite UI, here is the jsfiddle. http://jsfiddle.net/KendoDev/5Sssk/
Can you please report this issue via our support channels on telerik.com (forums or support system)? Thus my colleagues will review and set a timeframe for addressing it. Thank you for your understanding.