Available in the 2018 R2 SP release.
When you declare a specific CalendarAppointmentsStyle and assign it to the AppointmentsStyle property of the RadCalendar - it is not respected. However, if you try to set it in the NativeControlLoaded event, the changes are correctly applied. Available in minor release 2018.1.405. It will also be available in the R2 2018 release.
DateTimeContinuousAxis does not display afternoon times correctly. They appear as 'AM'
After setting properties like FillColor, LineColor, LineThickess, etc. they are overridden by the Chart default palette. Available in minor release 2017.2.0602. It will also be available in the R2 2017 SP release.
With the current release the chart does not update its series (and axis) when the BindingContext is set on a button click. Available in minor release 2017.3.927. It will also be available in the R3 2017 SP release.
A possible workaround is to manually set the MajorStepUnit and the MajorStep properties according to your setup. Edit: Avalable in R3 2017 SP release.
DateTimeContinuousAxis labels are off by one hour when device is in DST zone (Android). Available in the R3 2017 release.