This still seems to be an issue (at least I have the same problem, with Nextcloud).
Where can I find #219?
The issue tracker on the Gitlab project seems to be disabled.
I have contacts stored in ownCloud with PHOTO and other fields like X-GENDER and BDAY. After making changes to a contact on the phone those fields have disappeared in ownCloud. DAVDroid should keep fields it doesn’t know.
Duplicate of #118, please discuss there.