Out of Office appointments display blank Show As in published calendar

When creating an appointment, there are 4 selections for the Show As:  Busy, Free, Tentative, Out of Office.  If Out of Office is selected and the calendar is published, when doing a mouse over on that appointment the Show As field is blank.  If any of the other three options are selected the Show As field shows correctly when doing a mouse over on the appointment

This has been reported to engineering