If you create a contact-list from web gui, add some members and then save, when you display the list, the name of the members are shown as null (see attachment):

. null <foo@domain.com>
. null <bar@domain.com>

and on psql the list is stored as:

BEGIN:VLIST\r
UID:2E80-4AD2EC80-1-B72F73D0.vlf\r
VERSION:1.0\r
FN:Stuff\r
NICKNAME:Stuff\r
DESCRIPTION:Stuff\r
CARD;FN=null;EMAIL=foo@domain.com:2DF6-4AD1BD00-5-B72FA3D0.vcf\r\r
CARD;FN=null:EMAIL=bar@domain.com:2350-4AD0C780-7-B72D83D0.vcf\r
END:VLIST

this happens in your demo too.

Bye