Hello Scott Michetti,
Thank you for contacting us.
I tested RadComboBox control in a brand new solution and I could not reproduce your issue with continues scrolling. Could you please tell us what version of the control do you use? Please, try with the latest release and let us know if the issue still persists. If you send us a sample running project that reproduces the problem, it would be very helpful to investigate the problem.
I will be glad to assist you further.
All the best,
the Telerik team
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