We are afraid that we are not able to reproduce the issue. We are sending you this video
for your reference. Could you please modify the attached sample so the issue will be reproduced and send back to us the modified version in a support ticket, so we will be able to test it locally?
Do you need help with upgrading your ASP.NET AJAX, WPF or WinForms projects? Check the Telerik API Analyzer
and share your thoughts.