New entries in icalendar replaced as "New Entry"
I have a recurring and vexing problem where new appointments entered in iCalendar sometimes get taken out and then replaced with the words "New Entry". I am positive that this has happened repeatedly, that I really do type something into the appointment space, the letters appear on the screen, but then when I go back what I had typed is no longer there and the original "New Entry" is there instead. I have tried to re-create the problem in many ways, typing the entry, then going to a different application, and back to the calendar, but nothing I have tried lets me know how this problem is being created. Any ideas would be appreciated.
Thanks.
MacBook Pro (Retina, 13-inch, Early 2013), iOS 6.1.4