The initially reported issue was not reproduced on our side. You mentioned that you experience a similar behavior with "UI for Winforms using VB.net". Can you please confirm whether you are using the WPF GridView, or the WinForms one, as they are different controls, which do not share the code base? In case it is WPF, you can try isolating the issue in a sample project. Here
is a blog that can guide you through this process. If it is WinForms, I will get you in touch with the WinForms team.
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