our team found the issue in frozen columns functionality. If grid has no data, user can not scrolling header to the right.
Maybe we incorrect using this functionality. I created small demo that is based on a server-side binding, but problem is still, after scrolling in developer tools we can see JS error "Uncaught TypeError: Cannot read property 'cells' of undefined
at Object.Telerik.Web.UI.Grid.frozenScrollHanlder (Telerik.Web.UI.WebResource.axd... :3454)