In general, we are currently engaged in other high priority tasks and do not plan further mobile optimisations for the Kendo UI DatePicker widget in the short and medium term.
I can suggest sending a Dojo example demonstrating the inconsistent placement of the widget popup so I can investigate further.
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Check out the Windows Forms project converter, which aids the conversion process from standard Windows Forms applications written in C# or VB to Telerik UI for WinForms.For more information check out this blog post
and share your thoughts.