I’ve already read the bug with DAVdroid 0.8.3 and no, my contacts are not deleted after sync.
Here’s my problem:
I created (for each contact group one) my calrddav-sync entries and they show up in the “contacts” app on my phone. Syncing results in some contacts; None of them in the “Contacts” app but some of them in the “Phone” application, but really bad formatted with CVS delimiters all over the place. Only some are shown, though.
The calendar sync doesn’t work at all. The Calendar app on my phone tells me “No calendars to show” and after clicking on “calendars to synchronize” it tells me “No calendars to syncronize”.
Both the calendar and the contact groups are recognized and listed by DAVdroid correctly, though. There are no errors shown.
OS: Android 5.1.1 - CM 12.1-YOG4PAS1N0
DAVdroid 0.8.5.1 from F-Droid
owncloud 8.3.1 (just updated), hosted on shared hoster (uberspace.de)