Currently, RadTimePicker offers a Value property, typeof(DateTime?) even though the control is designed to manage time values.

With releasing .NET 6, there is TimeOnly type which would be more appropriate for managing time values:

https://devblogs.microsoft.com/dotnet/date-time-and-time-zone-enhancements-in-net-6/ 

Add a RadTimePicker to your project and select new time from the popup.

Expected: The clock element inside the popup should be updated accordingly to the newly set value.

Actual: The clock element remains unchanged. It is necessary to close and open the popup again.

Workaround:

        private void RadTimePicker1_ValueChanged(object sender, EventArgs e)
        {
            this.radTimePicker1.TimePickerElement.PopupContentElement.ClockElement.Value = this.radTimePicker1.Value;
        }