Thank you for this report.
We confirm that we had such issue in the RadDatePicker control, but as far as we are aware, it is already fixed in our latest released version of UI for UWP suite (version 2016_1_0314_2).
Is it possible to check it with this version and let us know if the problem still persist?
Thank you in advance.
Regards,
Vladislav
Telerik
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