MacOS Contacts + WebDAV Addressbook

Hi,

Since we upgraded from build 8251 to 8664 and then the latest build, some customers reported that their pre-upgrade existing contact groups/lists disappeared from their Contact application connected to SM via CardDAV.

He also can't create new groups / lists. The group disappear from the Contacts app after some seconds without being able to rename it or add members to it.

I went ahead and did a test with OSX Sonoma and a freshly created mailbox and I am seeing the same behavior as reported by our customers.

Also when looking at Contacts in the webmail for this account, there is a lot of "untitled lists" entries added which seems to correspond to my attempts at creating a group.