My confluence calendars names all changed automatically. How did this happen?

[Jeremy Price]

Basically the events within a specific calendar within my confluence space changed all the names to the title of the original calendar. Now every time I try to change them they revert back to the calendars title. How does this happened and how can I prevent this in the future?  

 Screen Shot 2016-04-20 at 10.23.33 AM.png

[Steve Behnke [DiscoverEquip.com]]

This sounds very severe. I'd recommend opening an issue with Atlassian at support.atlassian.com.

I've never heard of this happening before and a cursory glance through JAC shows no relevant open bugs.