https://forums.bitfire.at/topic/1145/davdroid-1-2-has-been-released/3
DAVdroid 1.2.2 adds a dialog to disable
the battery optimization. This prevents that Android stops the
automatic sync of DAVdroid if the GUI is not actively used.
DAVdroid 1.2.1 brings support for
unlimited amounts of attendees/reminders in events / unlimited
amount of contacts in groups (fixes
TransactionTooLargeException)
DAVdroid 1.2 now supports custom types
(labels) for contact properties using X-ABLabel.