I have already replied to the support ticket that was opened by you on this regard and I paste my answer below for the rest of the forum member.
I have tried reproducing the mentioned issue but to no avail. You can watch the short video test in the attached archive.
If you are not using the latest official Telerik UI version - 2014.2.724, does upgrading to it resolve the issue? If this step, however, do not help it would be better to try to reproduce the problem with the attached VS example and then send it back to me, so that i can proceed further with the investigation.
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