Thanks for writing back.
Since this is a customized user control, we might need to debug the scenario on our side in order to be able to say what causes the behavior in question. Is it possible for you to send us a project that reproduces the layout issue and the Null Reference exception? This will be extremely helpful in solving the case as we are currently not able to reproduce similar glitches on our side.
You will need to open a new support ticket in order to upload your projects.
Thanks for your time.
the Telerik team
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