I have a DAViCal server. My contacts are displatched in different groups. The groups are working fine on Apple Contacts application and also using carddavmate http://www.inf-it.com/open-source/clients/carddavmate/ so the problem is not on the server side.
After synchronising my contacts using davdroid 0.5.6-alpha the contacts are all in the “unaffected” group on my Android 4.3 Galaxy Note 2.
The .vcf record contains the group name in the CATEGORIES field:
I could not find any occurrence of “CATEGORIES” in the davdroid source code.
Are groups supposed to be working?