Unable to Edit Single Event Instance in Repeating Events

Summary

Users are unable to save their changes to a Single Occurrence of a Repeating Event they've edited within Team Calendars. The page refreshes and the change is reverted back to its original configuration. This only appears to affect Events which are repeating; single, non-repeating events can be edited.

Environment

• Cloud

Steps to Reproduce

1. On a Team Calendar, Create an event which has a repeat
2. Save Event
3. Edit one of the Events (either change it's title, date/time, Who, etc); ensure "Edit this instance only" is checked
4. Save Changes to event

Expected Results

The Single Event is updated with the new information

Actual Results

Calendar refreshes and change does not exist:
JIRA Logs:

2017-06-22 21:27:56.590677500 2017-06-22 21:27:56,586 WARN [http-bio-1998-exec-5 [tenantId:system-tenant] [traceId:ca88c2ad57fcfebf]] [extra.calendar3.util.TimeZoneUtil] tryParseDateTimeStringForEventEdit Unable to parse date  {{referer,https://INSTANCE.atlassian.net/wiki/calendar/mycalendar.action}{traceId,ca88c2ad57fcfebf}{url,/wiki/rest/calendar-services/1.0/calendar/events.json}{userName,scranford}}
2017-06-22 21:27:56.590680500  -- referer: https://INSTANCE.atlassian.net/wiki/calendar/mycalendar.action | url: /wiki/rest/calendar-services/1.0/calendar/events.json | traceId: ca88c2ad57fcfebf | userName: scranford

Notes

(Optional - If Necessary)

Workaround

Delete the Individual Calendar Event that needs to be Edited and create a new Event with the intended changes.