I was facing the issue for all browsers. After I upgrade telerik version from 2014.2.618.35 to 2016.2.607, this issue gets solved.
But now TableWizard.ascx throws an error as 'dc:TableDesign' is not a known server. Earlier it is working with my project.
Have checked with all references. Everything working fine but except this issue. I have written
'<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI.Editor.DialogControls" TagPrefix="dc" %>' at the top of the ascx page and trying to access 'dc:TableDesign'.
Please help for solving this issue.