Since we weren't able to reproduce the issue on our side, it would be best to send us a small application where the issue is reproduced so that we can further investigate it. Also, you can modify the project attached to this thread if you can reproduce the issue there.
Also, can you please tell us the RadControls version you are using, that would also help. Thank you in advance for your cooperation.
All the best,
the Telerik team
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