[horde] external attendees drop off when syncing calendar

[Abhi Jadhav]

Hi All, My setup is this - I am using Thunderbird Lightning to access 
the Horde calendar.  After running multiple tests, I have found 
something interesting.  Would like your thoughts on whether this is a bug:

Create an event through Thunderbird Lightning.
Add an external attendee and send out invite
Check the event in Thunderbird, the event looks intact with external 
attendees listed
Synchronize calendars
Check the event in Horde UI - the external attendees have dropped off.
Check the event in Thunderbird - the external attendees have dropped off.

Am I doing something wrong?

-- 
*Abhi Jadhav*
Managing Partner
Bay Leaf Digital
214 202 3966