Custom fields deleted ??

[neggenbe]

Hi,
I like the app, does what it's supposed to great so far.

I however encountered a problem: CalDAV allows entering custom fields in events. When uploading modified versions of events, these seems to have disappeared - which is NOT the case e.g. in Thunderbird CalDav sync.

Here an example of a custom event:

BEGIN:VCALENDAR
PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN
VERSION:2.0
BEGIN:VEVENT
LAST-MODIFIED:20151022T115233Z
DTSTAMP:20151022T115233Z
UID:20151022115100-547
SUMMARY:xcc
DTSTART:20151021T120000Z
DTEND:20151021T130000Z
X-MICROSOFT-CDO-BUSYSTATUS:BUSY
X-MY-CUSTOM-STATUS:BUSY
X-MY-CUSTOM-XML:\n\n
SEQUENCE:2
X-MOZ-GENERATION:2
END:VEVENT
END:VCALENDAR

When modifying the event and exporting it via sync adapter, X-fileds are missing on the server.

Is this a known issue, an issue on Android's internal process or is it a bug?