Following the provided information I created a test project in order to test the issue that you are facing. However, I was not able to observe the same issue while scrolling horizontally the grid. You can check the attached gif file.
I attached my test project for your reference. Could you please refer to it and let me know how it differs from your set up. Are you using any custom theme in your project? It would be greatly appreciated if you can modify the provided project in a way to reproduce the issue and get it back to me. Thus, we would be able to investigate the precise case and assist you further.
I am converting this forum thread into a support ticket in order to allow attachments. You can find it in your Telerik account.
I am looking forward to your reply.
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